1 2 3 4 UNITED STATES DISTRICT COURT 5 NORTHERN DISTRICT OF CALIFORNIA 6 7 MICROCHIP TECHNOLOGY Case No. 19-cv-01690-SI

INCORPORATED,

8 Plaintiff, ORDER RE: CLAIM CONSTRUCTION 9 v. 10

NUVOTON TECHNOLOGY

11 CORPORATION AMERICA, et al.,

12 Defendants.

13 14 On February 13, 2020, the Court heard argument on the parties’ proposed claim 15 constructions. Having considered the arguments and the papers submitted, the Court construes the 16 disputed terms as follows. 17 18 BACKGROUND 19 Plaintiff Microchip Technology Inc. (“Microchip”) filed this patent infringement action 20 against defendants Nuvoton Technology Corporation and Nuvoton Technology Corporation 21 America (“Nuvoton”) on October 10, 2018 in the District of Delaware. See Dkt. No. 1 (Complaint). 22 The complaint alleges infringement of six patents: U.S. Patent Nos. 7,075,261 (“the ’261 patent”); 23 7,126,515 (“the ’515 patent”); 7,353,417 (“the ’417 patent”); 7,930,576 (“the ’576 patent”); 24 9,442,873 (“the ’873 patent”); and 9,772,970 (“the ’970 patent”)1 (collectively, “the asserted 25 patents”). Id. On January 7, 2019, Microchip filed a first amended complaint, alleging infringement 26

27 1 The Court notes that the complaint and the parties’ claim construction briefing all address 1 of the same six patents. Dkt. No. 5 (Amended Complaint). The parties stipulated to a transfer of 2 the action from Delaware to the Northern District of California in late March 2019. Dkt. No. 10 3 (Stipulation Transferring Action). Nuvoton denies infringement and argues the asserted patents are 4 invalid. Dkts. Nos. 14, 15 (Defendants’ Answers). 5 6 LEGAL STANDARD 7 Claim construction is a matter of law. Markman v. Westview Instr., Inc., 517 U.S. 370, 372 8 (1996). Terms contained in patent claims are “generally given their ordinary and customary 9 meaning.” Phillips v. AWH Corp., 415 F.3d 1303, 1312 (Fed. Cir. 2005). “[T]he ordinary and 10 customary meaning of a claim term is the meaning that the term would have to a person of ordinary 11 skill in the art in question at the time of the invention[.]” Id. at 1313. In determining the proper 12 construction of a claim, a court begins with the intrinsic evidence of record, consisting of the claim 13 language, the patent specification, and, if in evidence, the prosecution history. Id. at 1314; see also 14 Vitronics Corp. v. Conceptronic, Inc., 90 F.3d 1576, 1582 (Fed. Cir. 1996). “The appropriate 15 starting point . . . is always with the language of the asserted claim itself.” Comark Communications, 16 Inc. v. Harris Corp., 156 F.3d 1182, 1186 (Fed. Cir. 1998); see also Abtox, Inc. v. Exitron Corp., 17 122 F.3d 1019, 1023 (Fed. Cir. 1997). 18 Accordingly, although claims speak to those skilled in the art, claim terms are construed in 19 light of their ordinary and accustomed meaning, unless examination of the specification, prosecution 20 history, and other claims indicates that the inventor intended otherwise. See Electro Medical 21 Systems, S.A. v. Cooper Life Sciences, Inc., 34 F.3d 1048, 1054 (Fed. Cir. 1994). The written 22 description can provide guidance as to the meaning of the claims, thereby dictating the manner in 23 which the claims are to be construed, even if the guidance is not provided in explicit definitional 24 format. SciMed Life Systems, Inc. v. Advanced Cardiovascular Systems, Inc., 242 F.3d 1337, 1344 25 (Fed. Cir. 2001). In other words, the specification may define claim terms “by implication” such 26 that the meaning may be “found in or ascertained by a reading of the patent documents.” Vitronics, 27 90 F.3d at 1584 n.6. 1 Although claims are interpreted in light of the specification, this “does not mean that everything 2 expressed in the specification must be read into all the claims.” Raytheon Co. v. Roper Corp., 724 3 F.2d 951, 957 (Fed. Cir. 1983). For instance, limitations from a preferred embodiment described in 4 the specification generally should not be read into the claim language. See Comark, 156 F.3d at 5 1187. However, it is a fundamental rule that “claims must be construed so as to be consistent with 6 the specification[.]” Phillips, 415 F.3d at 1316 (citations omitted). Therefore, if the specification 7 reveals an intentional disclaimer or disavowal of claim scope, the claims must be read consistently 8 with that limitation. Id. 9 Finally, the Court may consider the prosecution history of the patent, if in evidence. 10 Markman, 52 F.3d at 980. The prosecution history limits the interpretation of claim terms so as to 11 exclude any interpretation that was disclaimed during prosecution. See Southwall Technologies, 12 Inc. v. Cardinal IG Co., 54 F.3d 1570, 1576 (Fed. Cir. 1995). In most situations, analysis of this 13 intrinsic evidence alone will resolve claim construction disputes. See Vitronics, 90 F.3d at 1583. 14 Courts should not rely on extrinsic evidence in claim construction to contradict the meaning of 15 claims discernable from examination of the claims, the written description, and the prosecution 16 history. See Pitney Bowes, Inc. v. Hewlett-Packard Co., 182 F.3d 1298, 1308 (Fed. Cir. 1999) 17 (citing Vitronics, 90 F.3d at 1583). However, it is entirely appropriate “for a court to consult 18 trustworthy extrinsic evidence to ensure that the claim construction it is tending to from the patent 19 file is not inconsistent with clearly expressed, plainly apposite, and widely held understandings in 20 the pertinent technical field.” Id. at 1309. Extrinsic evidence “consists of all evidence external to 21 the patent and prosecution history, including expert and inventor testimony, dictionaries, and 22 learned treatises.” Phillips, 415 F.3d at 1317 (citation omitted). All extrinsic evidence should be 23 evaluated in light of the intrinsic evidence. Id. at 1319. 24 25 DISCUSSION 26 Pursuant to Patent Local Rule 4-3(c), parties are required to identify up to ten terms whose 27 construction will be most significant to the resolution of the case. Patent L. R. 4-3(c). The parties 1 (Joint Claim Construction Statement). At oral argument, the parties agreed to constructions for two 2 of the ten claim terms: “responsive to” and “a plurality of trigger selection circuits, for selectively 3 coupling selected ones of the plurality of analog inputs to a respective one of the sample and hold 4 circuits.” Hearing Transcript at 68:17-70:5, 70:10-71:10. The Court hereby construes these terms 5 in accordance with the parties’ agreements, reflected in their Supplemental Joint Claim Construction 6 Statement. Dkt. No. 84. 7 Following the parties’ agreement, the parties dispute the construction of eight claim terms 8 from four of the asserted patents. The Court addresses each of the disputed terms in turn. 9 10 I. ’576 Patent - “switching access” 11 The ’576 patent, entitled “Sharing Non-Sharable Devices Between an Embedded Controller 12 and a Processor in a Computer System”, discloses and claims systems and methods for sharing a 13 device between a host processor and a microcontroller. Dkt. No. 5 ¶ 24 (Amended Complaint). 14 Claim 6 reads: 15 6. A method for sharing a non-volatile memory between a processor and a microcontroller in a system, comprising: 16 in response to a change in system state to a first state wherein the 17 microcontroller is assured safe access to the non-volatile memory, holding the system in the first state and switching access to the non-volatile memory 18 from the processor to the microcontroller; 19 while the system is held in the first state, fetching program instructions or data from the non-volatile memory and loading the program instructions or 20 data into a memory of the microcontroller; and 21 after the program instructions or data have been loaded, switching access to the non-volatile memory from the microcontroller to the processor, and 22 releasing the system from the first state. 23 ’576 patent, 16:32-46. 24 The term “switching access” appears in independent claim 6 of the ’576 patent. Microchip 25 asks the Court to construe the term in accordance with its plain and ordinary meaning. Dkt. No. 59- 26 1 at 14 (Joint Claim Construction Statement).2 Nuvoton proposes this term be construed as 27 1 “changing the state of a switch that controls access to the memory by one of the processor or the 2 microcontroller.” Id. Microchip primarily disputes the requirement that “switching access” be 3 performed by a switch. Dkt. No. 62 at 5-7 (Plaintiff’s Opening Brief). 4 Nuvoton asserts that the ’576 patent discloses two different techniques for sharing a non- 5 volatile memory between processors in a computer system. Dkt. No. 63 at 8-9 (Defendants’ 6 Responsive Brief). In the first, the microcontroller prevents the processor from accessing the 7 memory by generating a signal. Id. at 9. Nuvoton argues that claims without the “switching access” 8 term cover this technique through language like “holding a system reset signal in a reset state.” Id. 9 (citing claim 17). Nuvoton claims the second technique, encompassed by the “switching access” 10 term, uses a switch. Id. 11 Microchip argues that claim 6, which includes the term “switching access”, does not recite 12 a “switch” and therefore covers any method of switching. Dkt. No. 62 at 5 (Plaintiff’s Opening 13 Brief). In support, Microchip points to claims 125, 126, and 127, which recite “wherein switching 14 access to the non-volatile memory from the processor to the microcontroller and from the 15 microcontroller to the processor is performed via software [126,] hardware [127, or] a combination 16 of software and hardware [127].” ’576 Reexam Cert., 8:19-30. Microchip also argues that 17 Nuvoton’s construction conflicts with claim 137, which recites “wherein switching access to the 18 non-volatile memory from the microcontroller to the processor comprises reconfiguring the access 19 to the non-volatile memory via the switch.” Id. at 9:1-4. 20 Microchip asserts that the specification also discloses examples of “switching access” 21 without a switch. Dkt. No. 66 at 5 (Reply Brief). In particular, Microchip refers to Figure 2, shown 22 below, which describes how “the microcontroller sets control signals to cause access to the shared 23 device to be with the microcontroller.” Dkt. No. 66 at 5 (Reply Brief). 24 25 26 27 ] in response to a system state change, such as power on reset, where a microcontroller in a system is assured of safe access to a shared 2 device, or can prevent the system from entering a state where a processor in the system can access the shared device, the 3 microcontroller sets control signals to cause access to the shared device to be with the A microcontroller 202 5 while in the state where the microcontroller is 6 insured safe access to the device, or can prohibit access by the processor in the system 7 to the shared device, and has properly configured access to the device, the microcontroller retrieves or exchanges data 8 with the device 204 9 once the controller has completed the data 10 retrieval or exchange with the device or has determined that it may no longer be assured 1 1 of safe access, the microcontroller reconfigures the interface through control signals to enable access by the processor in a 12 the system 206

“a once the microcontroller has configured the v 14 device to enable access by the processor in the system, the microcontroller changes or 5 15 allows change of the system state, thereby permitting the processor in the system to access the shared device

16 208

Figure 2

Z 18 °576 patent, Fig. 2. 19 Microchip also argues that the intrinsic record does not support Nuvoton’s assertion that the 20 || patent discloses two different techniques for sharing a non-volatile memory between processors in 21 acomputer system. Dkt. No. 66 at 5-6 (Reply Brief). Microchip cites to claim 6 in support, stating 22 || that the recited “switching access” and “holding/releasing” steps are all part of one method of 23 sharing amemory. /d. at 6. 94 The Court concludes the term “switching access” does not require a switch. The Court 25 agrees with plaintiff that the intrinsic record does not support defendant’s segmentation of two 26 || different techniques for sharing a non-volatile memory between processors in a computer system. 27 ‘|| Further, dependent claim 137 limits “switching access” to “reconfiguring the access to the non- 28 volatile memory via the switch.” °576 Reexam Cert., 9:1-4. Thus the “switching access” of fn

1 independent claim 6 must be broader than “reconfiguring the access to the non-volatile memory via 2 the switch” or claim 137 would be superfluous. “Under the doctrine of claim differentiation, 3 dependent claims are presumed to be of narrower scope than the independent claims from which 4 they depend.” AK Steel Corp. v. Sollac, 344 F.3d 1234, 1242 (Fed. Cir. 2003). This “presumption 5 is especially strong when the limitation in dispute is the only meaningful difference between an 6 independent and dependent claim, and one party is urging that the limitation in the dependent claim 7 should be read into the independent claim.” SunRace Roots Enter. Co. v. SRAM Corp., 336 F.3d 8 1298, 1303 (Fed. Cir. 2003). Therefore, the Court adopts the plain and ordinary meaning for the 9 term “switching access.” 10 11 II. ’873 Patent 12 The ’873 patent, entitled “Direct Memory Access Controller”, discloses and claims systems 13 and methods for direct memory access. Dkt. No. 5 at ¶ 22 (Amended Complaint). Claim 1 of the 14 ’873 patent reads: 15 1. A DMA controller comprising: 16 a channel arbiter configured to select an enabled DMA channel as an active DMA channel for a data transfer and to arbitrate among enabled DMA 17 channels after a beat of data is transferred in the data transfer; and 18 a channel buffer coupled to the channel arbiter and configured to receive a transfer descriptor of the active DMA channel, the data transfer being 19 performable using the active DMA channel and the transfer descriptor, wherein the DMA controller is configured to enable a DMA channel by 20 storing a fetched transfer descriptor in a portion of memory. 21 ’873 patent, 10:58-11:03. The parties dispute the construction of two terms, both of which are part 22 of claim 1 of the ’873 patent. 23

24 A. “after a beat of data is transferred in the data transfer” 25 The parties dispute the meaning of the phrase “a beat of data” within the term “after a beat 26 of data is transferred in the data transfer” from claims 1, 16, and 24 of the ’873 patent. Microchip 27 argues that a “beat of data” is the “data transferred in a single bus access.” Dkt. No. 59-1 at 7 (Joint 1 Claim Construction Statement). Nuvoton, relying on the prosecution history, asserts that “beat of 2 data” should be construed as “each clock cycle of data.” Id. 3 In support of its argument, Nuvoton notes that, during prosecution, the applicant traversed 4 the PTO’s rejection of the application as obvious over U.S. Patent Publication No. 2004/0123013 5 (“Clayton”) in view of U.S. Patent No. 7,912,997 (“Murray”). Dkt. 62-4 at 9 (Plaintiff’s Opening 6 Brief). In seeking to overcome the objection, the applicant stated “as acknowledged in the Office 7 Action, ‘Murray does disclose ‘a beat’ (see Colum 26, Lines 53-57) is a [sic] merely a clock 8 cycle.’” Id. at 10-11 (emphasis in original). The applicant then argued that “the cited portions of 9 Murray fail to disclose or suggest ‘a channel arbiter configured to select an enabled DMA channel 10 as an active DMA channel for a data transfer and to arbitrate among enabled DMA channels after 11 a beat of data is transferred in the data transfer’ as recited in amended claim 2[.]” Id. (emphasis 12 in original). Nuvoton argues that by failing to object to the PTO examiner’s definition of “a beat”, 13 the applicant (now patentee) accepted it. Dkt. No. 63 at 16 (Defendants’ Responsive Brief). 14 Microchip argues that its proposed construction hails from the specification. Dkt. No. 62 at 15 11 (Plaintiff’s Opening Brief). In support, Microchip relies on a passage describing how “[d]ata 16 transfers can be characterized as either single beat or burst” and “a beat access includes a single bus 17 access.” Id. (citing ’873 patent, 3:35-40). The ’873 patent describes how “[t]he beat size can vary 18 depending on the architecture of the system, and can be configured to support, for example, sizes of 19 a byte, a half-word, or a word. A burst may be defined as N beats where N can be an integer, such 20 as 1, 4, 8, or 16 in some configurations.” ’873 patent, 3:38-42. Microchip argues that because the 21 term “clock” and phrase “clock cycle” do not appear in the ’873 patent, Nuvoton’s construction 22 improperly imports a limitation from an unrelated patent into the claims.3 Dkt. No. 62 at 11-12 23 (Plaintiff’s Opening Brief). Finally, Microchip argues that Nuvoton has not met the standard to 24 show a clear and unmistakable disclaimer of claim scope. Id. at 12-13. 25 The Court agrees that defendant’s construction is too narrow. While the Court may consider 26 the prosecution history of the patent, in this instance, it is not instructive. Markman, 52 F.3d at 980. 27 1 Considering the specification’s reference to “beat access” as “single bus access” (’873 patent, 3:37), 2 the Court construes “a beat of data” as “data transferred in a single bus access.” 3 4 B. “channel arbiter” 5 The parties dispute the construction of the term “channel arbiter.” Microchip asks the Court 6 to construe the term in accordance with its plain and ordinary meaning. Dkt. No. 59-1 at 6 (Joint 7 Claim Construction Statement). Nuvoton proposes that the term “channel arbiter” be construed as 8 “a device that selects one of the enabled DMA channels as an active DMA channel for a data transfer 9 based on those channel’s priority levels.” Id. Microchip primarily disputes the requirement that a 10 “channel arbiter” select a channel based on priority level. Dkt. No. 62 at 13 (Plaintiff’s Opening 11 Brief). In the alternative, Microchip proposes the term be construed as “channel coordinator” or “a 12 device or circuit that selects a channel based on one or more criteria.” Dkt. No. 59-1 at 6 (Joint 13 Claim Construction Statement). 14 In support of its arguments, Microchip relies on portions of the ’873 patent’s specification 15 that describe “a channel arbiter that selects one of the enabled DMA channels as an active SMA 16 channel for data transfer based on one or more criteria.” Dkt. No. 62 at 14 (Plaintiff’s Opening 17 Brief) (citing ’873 patent, 1:45-50, ’873 patent,1:58-59 (describing “arbitrating, based on one or 18 more criteria”)). Microchip also notes that the ’873 patent discloses arbitration using a “scheduling 19 scheme” as opposed to an assigned priority level. Id. (citing ’873 patent, 7:53-57). 20 Nuvoton cites to many of the same portions of the specification to support its argument that 21 arbitration must be based on channel priority level. Dkt. No. 63 at 17 (Defendants’ Responsive 22 Brief) (citing ’873 patent, 4:8-11, 7:53-57, 8:16-27, 9:22-27, and 10:33-41). Nuvoton asserts that 23 even in embodiments involving a “scheduling scheme,” the channel arbiter examines channel 24 priorities. Id. at 18. 25 The Court finds that both the claims and the specification demonstrate that channel 26 arbitration must be based on one or more criteria, including but not limited to priority level. Indeed, 27 the ’873 patent discloses arbitration based on channel priority level as simply one embodiment. The arbitration can be performed based on DMA channel priority level wherein each 1 channel has an assigned priority level. In some implementations, the arbitration can use scheduling scheme to ensure all DMA channel requests are serviced. 2 ’873 patent, 7:53-57. The specification also describes “arbitrating, based on one or more criteria” 3 (id. at 1:58-59) and “a channel arbiter that selects one of the enabled DMA channels as an active 4 DMA channel for data transfer based on one or more criteria[.]” Id. at 1:46-48. Therefore, the 5 Court adopts plaintiff’s construction and construes a “channel arbitrator” as “a device or circuit that 6 selects a channel based on one or more criteria.” 7

8 III. ’417 Patent – “receiving data and a first command to transfer said data from said 9 control unit” 10 The ’417 patent, entitled “Microcontroller with Synchronised Analog to Digital Converter”, 11 discloses and claims systems and methods for synchronizing a digital to analog converter. Dkt. No. 12 5 at ¶ 21 (Amended Complaint). 13 Claim 1 reads: 14 1. A microcontroller comprising: 15 a control unit (UC), 16 at least one digital to analog converter (DAC) as a peripheral of said control 17 unit, 18 a buffer register located between said control unit and said converter, receiving data and a first command to transfer said data from said 19 control unit, and 20 means of synchronization of said converter including a register inserted between said buffer register and said converter, said register receiving a 21 second transfer command independent of said control unit when a transition in a synchronization signal, corresponding to a hardware interrupt, is 22 detected. 23 ’417 patent, 8:57-9:02. 24 The term “receiving data and a first command to transfer said data from said control unit” 25 appears in independent claims 1 and 10 of the ’417 patent. The parties dispute whether the term is 26 indefinite for failing to comply with 35 U.S.C. § 112, ¶ 2.4 Dkt. No. 59-1 at 6 (Joint Claim 27 1 Construction Statement). Pursuant to this statute, a patent specification must “conclude with one or 2 more claims particularly pointing out and distinctly claiming the subject matter which the applicant 3 regards as his invention.” 35 U.S.C. § 112. The Supreme Court has found that “a patent is invalid 4 for indefiniteness if its claims, read in light of the specification delineating the patent, and the 5 prosecution history, fail to inform, with reasonable certainty, those skilled in the art about the scope 6 of the invention.” Nautilus, Inc. v. Biosig Instruments, Inc., 572 U.S. 898, 901 (2014). 7 Microchip proposes this term be construed as “receiving (1) data and (2) a first command to 8 transfer said data from the control unit.” Dkt. No. 59-1 at 6 (Joint Claim Construction Statement). 9 Nuvoton argues the term renders the ’417 patent indefinite because “it is not clear when 10 infringement of [the] claim would occur.” Dkt. No. 63 at 19 (Defendants’ Responsive Brief). In 11 making this argument, Nuvoton relies on Rembrandt Data Technologies, LP v. AOL, LLC, 641 F.3d 12 1331 (Fed. Cir. 2011), a case decided before Nautilus. Id. In particular, Nuvoton argues that claims 13 of the ’417 patent with this term are similar to a claim found indefinite in Rembrandt that recited 14 both an apparatus and a method of using that apparatus. Id. The claim in Rembrandt recited “a data 15 transmitting device . . . comprising: first buffer means . . .; fractional encoding means . . .; second 16 buffer means . . .; trellis encoding means . . .; and transmitting the trellis encoded frames.” 17 Rembrandt, 641 F. 3d at 1339 (emphasis added). The Federal Circuit found that because the first 18 four elements recite apparatus elements and the final element is a method, the claim and its 19 dependent claims were indefinite. Id. 20 In rebuttal, Microchip relies on MasterMine Software, Inc. v. Microsoft Corp., 874 F.3d 1307 21 (Fed. Cir. 2017). Dkt. No. 66 at 8 (Reply Brief). In MasterMine, the Federal Circuit reversed a 22 district court’s finding of indefiniteness because the claims at issue used “permissible functional 23 language to describe the capabilities of the claimed system.” Id. at 1316. Microchip argues the ’417 24 patent’s claims are similar to those in MasterMine, not Rembrandt. Dkt. No. 66 at 8-9 (Reply Brief). 25 For comparison, the claim at issue in MasterMine recited “a reporting module installed within the 26 CRM software application . . . wherein the reporting module installed within the CRM software 27 1 application presents a set of user-selectable database fields as a function of the selected report 2 template, receives from the user a selection of one or more of the user-selectable database fields, 3 and generates a database query as a function of the user selected database fields.” MasterMine, 874 4 F.3d at 1315 (emphasis in original). The Federal Circuit found that, though the claim included 5 “active verbs—presents, received, and generates—these verbs represent permissible functional 6 language used to describe capabilities of the ‘reporting module.’” Id. In addition, MasterMine 7 distinguished Rembrandt, stating, “the functional language here does not appear in isolation, but 8 rather, is specifically tied to structure: the reporting module installed within the CRM software 9 application.” Id. at 1316. 10 Microchip argues that the ’417 patent’s claims including the “receiving data . . .” term are 11 substantially similar to the claim in MasterMine because the functional language of “receiving” is 12 specifically tied to a structure, a buffer register. Dkt. No. 66 at 8-9 (Reply Brief). The Court agrees. 13 Although claim 1 of the ’417 patent does not explicitly tie the “buffer register” structure to the 14 function of “receiving data and a first command to transfer said data from said control unit,” the 15 Court finds linking language in the specification. ’417 patent, 5:9-11 (“the buffer register RT 16 32 receives data 38 and a command 39 to transfer these data called the first transfer command 39, 17 from the control unit 31”). Accordingly, the Court concludes, because claims with the “receiving 18 data . . .” term inform those skilled in the art with reasonable certainty about the scope of the ’417 19 patented invention, they are sufficiently definite. 20 Therefore, the Court adopts plaintiff’s construction and construes “receiving data and a first 21 command to transfer said data from said control unit” as “receiving (1) data and (2) a first command 22 to transfer said data from the control unit.” 23 24 IV. ’970 Patent 25 The ’970 patent, entitled “Multi-Protocol Serial Communication Interface”, discloses and 26 claims systems and methods for multi-protocol serial communication interfaces. Dkt. No. 5 at ¶ 23 27 (Amended Complaint). Claim 1 of the ’970 patent reads: an interface module including a buffer or register for storing a protocol 1 selection; 2 a protocol module coupled to the interface module and configured for providing configuration data for one of two or more serial communication 3 protocols based on the protocol selection; 4 a serial engine module coupled to the interface module and the protocol module, the serial engine module configured for: 5 determining from the protocol selection that data or commands are to 6 be transmitted and received on a serial communication bus using synchronous communication; 7 determining that a port control module coupled to the serial 8 communication bus is configured for asynchronous communication on the serial communication bus; 9 reconfiguring the port control module from asynchronous serial 10 communication to synchronous serial communication on the serial communication bus, including selecting one of an internal or an 11 external clock signal for synchronous communication on the serial communication bus; and 12 transmitting and receiving data or commands over the serial 13 communication bus synchronously using the clock signal. 14 ’970 patent, 7:54-8:12. Defendant submitted the expert declaration of Dr. Michael C. Brogioli in 15 support of its arguments regarding the four disputed terms from the ’970 patent. See Dkt. No. 63-7 16 (Brogioli Declaration). 17 The parties dispute whether four terms from claim 1 of the ’970 patent contain means-plus- 18 function terms subject to § 112(f). The burden of proof that a disputed claim is subject to § 112(f) 19 rests with the party asserting the means-plus-function construction. Apex Inc. v. Raritan Computer, 20 Inc., 325 F.3d 1364, 1372 (Fed. Cir. 2003). While the use of the word “means” creates a 21 presumption of a means-plus-function term, it is not by itself sufficient. Allen Eng’g Corp. v. Bartell 22 Indus., Inc., 299 F.3d 1336, 1347 (Fed. Cir. 2002) (the “mere use of the word ‘means’ after a 23 limitation, without more, does not suffice to make that limitation a means-plus-function 24 limitation.”). The presumption is rebutted if the claim recites sufficient structure to perform the 25 claimed function. Id.; Cole v. Kimberly–Clark Corp., 102 F.3d 524, 531 (Fed. Cir. 1996). 26 Conversely, “the failure to use the word ‘means’ also creates a rebuttable presumption—this 27 time that § 112, para. 6 does not apply.” Williamson v. Citrix Online, LLC, 792 F.3d 1339, 1348 1 (Fed. Cir. 2015). In Williamson, the Federal Circuit overruled prior case law and held that the 2 rebuttable presumption that § 112(f) does not apply is not strong, and held that “[w]hen a claim term 3 lacks the word ‘means,’ the presumption can be overcome and § 112, para. 6 will apply if the 4 challenger demonstrates that the claim term fails to ‘recite sufficiently definite structure’ or else 5 recites ‘function without reciting sufficient structure for performing that function.’” Id. at 1348 6 (quoting Watts v. XL Sys., Inc., 232 F.3d 877, 880 (Fed. Cir. 2000)). The claim term recites definite 7 structure if “the words of the claim are understood by persons of ordinary skill in the art to have a 8 sufficiently definite meaning as the name for structure.” Id. (citing Greenberg v. Ethicon Endo- 9 Surgery, Inc., 91 F.3d 1580, 1583 (Fed. Cir. 1996)). Because none of the disputed means-plus- 10 function terms contain the word “means,” the defendant must overcome the rebuttable presumption 11 that § 112(f) does not apply by showing that the claim term does not recite definite structure 12 understood by a person of ordinary skill in the art. 13 14 A. “interface module” 15 The parties dispute the construction of the term “interface module.” Microchip asks the 16 Court to construe the term in accordance with its plain and ordinary meaning. Dkt. No. 59-1 at 8- 17 9 (Joint Claim Construction Statement). Alternatively, if 35 U.S.C. § 112(f) applies, Microchip 18 proposes the term’s function be construed as “storing a protocol selection,” and the term’s structure 19 be construed as “a buffer or register.” Id. Nuvoton asserts that 35 U.S.C. § 112(f) applies. Id. 20 Nuvoton proposes the term’s function be construed as “storing a protocol selection,” and the 21 structures associated with the claimed function are “control & status registers, transmit & receive 22 registers, and at least one baud register.” Id. Nuvoton asserts that, because these structures do not 23 perform the claimed functions, the term is indefinite. Id. 24 Microchip argues the term “interface module” is not subject to § 112(f) because it recites a 25 specific structure (a buffer or register) that performs the claimed function (storing a protocol 26 selection). Dkt. No. 62 at 19 (Plaintiff’s Opening Brief). Nuvoton counters that “buffer” and 27 “register” are generic terms that fail to avoid application of § 112(f) because an ordinarily skilled 1 a protocol selection. Dkt. No. 63 at 28-29 (Defendants’ Responsive Brief). Nuvoton argues that 2 the specification describes the term “interface module” as a collection of black boxes—a buffer, 3 control and status registers, a baud register, and transmit and receive registers—that are each in turn 4 described in purely functional terms. Id. at 28. 5 The Court finds the ’970 patent claims and specification disclose adequate structure to 6 sustain the presumption that § 112(f) does not apply to the term “interface module.” The relevant 7 language from claim 1 reads “an interface module including a buffer or register for storing a 8 protocol selection.” ’970 patent, 7:55-56 (emphasis added). The specification further describes 9 how “the interface module 210 may include the control and status registers 212” and “one or more 10 settings related to the selected serial communication protocol may be stored in the control and status 11 registers 212.” Id. at 4:45-46, 4:51-54. These disclosures are sufficient to connote structure. 12 Accordingly, the Court adopts the plain and ordinary meaning for the term “interface module.” 13 14 B. “protocol module” 15 The parties agree that the term “protocol module” is subject to 35 U.S.C. § 112(f), but 16 disagree as to whether the ’970 patent discloses structure corresponding to the claimed function of 17 “providing configuration data for one of two or more serial communication protocols based on the 18 protocol selection.” Dkt. No. 59-1 at 9 (Joint Claim Construction Statement). Microchip proposes 19 the term’s structure be construed as “a lookup table of configuration settings.” Id. Nuvoton asserts 20 that the term is indefinite because the specification does not disclose any structure for performing 21 the claimed function. Id. 22 Nuvoton argues that the ’970 patent specification provides no corresponding structure and 23 its expert disclaims that the patent discloses a “lookup table.” Dkt. No. 63 at 27 (Defendants’ 24 Responsive Brief). In the alternative, Nuvoton asserts that even if module 220 were a lookup table, 25 it is insufficient structure to perform the claimed function of “providing configuration data for one 26 of two or more serial communication protocols based on the protocol selection.” Id. In support of 27 this argument, Nuvoton’s expert describes how the ’970 patent claims an interface for switching 1 (Brogioli Declaration). Dr. Brogioli concludes that a POSA would not have known with reasonable 2 || certainty how to design a “protocol module” that would provide configuration data to enable said 3 || unknown circuitry to work. Id. Relying on this conclusion, Nuvoton argues a “lookup table” cannot 4 || perform the claimed function of a “protocol module.” 5 Microchip argues that Dr. Brogioli’s conclusions contradict the ’970 patent specification. 6 || Dkt. No. 66 at 15 (Reply Brief). In support, Microchip cites to Figure 2, shown below with 7 annotations, and its corresponding description of a protocol module 220 that includes one or more 8 || protocol configuration settings 224. 9

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Z 18 || Microchip also argues that it is not required that the ’970 patent disclose the “laundry list of specific 19 || data elements” required by Nuvoton’s expert. Dkt. No. 66 at 15 (Reply Brief). 20 The Court agrees with the parties and finds the term “protocol module” is subject to 35 21 U.S.C. § 112). The Court also adopts the agreed-upon function of “providing configuration data 22 || for one of two or more serial communication protocols based on the protocol selection.” 23 Considering the record, the Court concludes that the ’970 patent fails to disclose structure 24 || corresponding to the claimed function of “providing configuration data for one of two or more serial 25 communication protocols based on the protocol selection.” The Court agrees with plaintiff that the 26 || specification describes and depicts how a “protocol module 220 may include one or more protocol 27 configuration settings 224.” °970 patent, 4:36-37, Fig. 2. The specification also discusses how the 28 “protocol module 220 may be coupled to the interface module 210 and may receive a protocol

1 setting from the interface module. Based on the received protocol setting, one of the protocol 2 configurations of the protocol module 220 may be selected.” Id. at 4:40-44: see also id. at 6:26-30 3 (describing how “the protocol module 220 may receive the selected protocol from one of the control 4 and status registers 212 and based on the received selection may select one of the protocol 5 configuration settings 224”). Thus, the ’970 patent discloses how the protocol module receives 6 protocol settings and selects one of the protocol selection settings, but does not set forth how the 7 protocol module “provid[es] configuration data for one of two or more serial communication 8 protocols based on the protocol selection.” ’970 patent, 7:58-60. While Figure 2 may illustrate a 9 “lookup table[5] of configuration settings” as Microchip argues, the ’970 patent does not associate 10 it with the claimed function. Williamson, 792 F.3d at 1352 (noting that “structure disclosed in the 11 specification qualifies as ‘corresponding structure’ if the intrinsic evidence clearly links or 12 associates that structure to the function recited in the claim”). 13 Accordingly, the Court finds that claim 1 is indefinite. 14 15 C. “serial engine module” 16 Microchip argues that 35 U.S.C. § 112(f) does not apply to the term “serial engine module” 17 because it does not recite the term “means” and connotes structure for transmitting and receiving 18 serial communications. Dkt. No. 62 at 23 (Plaintiff’s Opening Brief). Alternatively, if 35 U.S.C. 19 § 112(f) applies, Microchip proposes the term’s structure be construed as a “microcontroller 130 20 performing disclosed algorithm” and its function be construed in accordance with Nuvoton’s 21 proposal. Hearing Transcript at 136:23-137:18. Nuvoton asserts that 35 U.S.C. § 112(f) applies 22 and proposes the term’s function be construed to include (1) determining from the protocol selection 23 that data or commands are to be transmitted and received on a serial communication bus using 24 synchronous communication; (2) determining that a port control module coupled to the serial 25 communication bus is configured for asynchronous communication on the serial communication 26 bus; (3) reconfiguring the port control module from asynchronous serial communication to 27 1 synchronous serial communication on the serial communication bus; (4) selecting one of an internal 2 or an external clock signal for synchronous communication on the serial communication bus; (5) 3 transmitting and receiving data or commands over the serial communication bus synchronously 4 using the clock signal; and (6) configuring the port control module for communicating through 5 communication pins. Dkt. No. 63 at 23 (Defendants’ Responsive Brief). Nuvoton argues the ’970 6 patent is indefinite because it fails to disclose corresponding structure(s) that perform the claimed 7 functions. Id. 8 In arguing that the term “serial engine module” connotes structure, Microchip asserts that 9 the term equates with the phrase “serial interface engine” or “SIE” and is a term of art in the industry. 10 Dkt. No. 62 at 23-24 (Plaintiff’s Opening Brief); Hearing Transcript at 138:16-140:8. In support, 11 Microchip refers to technical documents and related patents describing an embedded SIE and the 12 USB standard, which includes a serial interface engine. Id. Nuvoton counters that Microchip’s 13 position fails for lack of evidence and cites to its expert opinion that the term “serial engine module” 14 does not connote structure but merely refers to “a generic black box” that performs functions 15 unrelated to the claimed functions. Dkt. No. 63 at 24-25 (Defendants’ Responsive Brief). 16 In the alternative, Microchip argues that, if § 112(f) applies, the structure corresponding to 17 a “serial engine module” is “circuitry, such as SERCOM 162 within microcontroller 130, 18 performing a serial communication algorithm.” Dkt. No. 62 at 25 (Plaintiff’s Opening Brief). 19 Microchip states that the ’970 patent specification discloses multiple serial communication 20 algorithms, including at Figures 3 and 4 and their corresponding descriptions. Id. 21 Nuvoton argues that Figures 3 and 4 and their corresponding descriptions do not describe 22 how to perform all the claimed functions. Dkt. No. 63 at 26 (Defendants’ Responsive Brief). 23 Microchip argues that the ’970 patent need not recite detailed descriptions of the claimed functions 24 because a person of ordinary skill would understand how to perform them. Dkt. No. 66 at 17 (Reply 25 Brief). Microchip also relies on WMS Gaming, Inc. v. Int’l Game Tech., 184 F.3d 1339 (Fed. Cir. 26 1999) to argue that the ’970 claims survive because they recite an algorithm to configure circuitry 27 to create a special purpose machine for carrying out the particular algorithm. Id. 1 to the term “serial engine module.” While the rebuttable presumption that § 112(f) does not apply 2 is not strong when a claim term lacks the word “means,” the presumption can only be overcome “if 3 the challenger demonstrates that the claim term fails to ‘recite sufficiently definite structure’ or else 4 recites ‘function without reciting sufficient structure for performing that function.’” Williamson, 5 792 F.3d at 1349. “When evaluating whether a claim limitation invokes § 112, ¶ 6, the essential 6 inquiry remains ‘whether the words of the claim are understood by persons of ordinary skill in the 7 art to have a sufficiently definite meaning as the name for structure.’” Zeroclick, LLC v. Apple Inc., 8 891 F.3d 1003, 1007 (Fed. Cir. 2018) (quoting Williamson, 792 F.3d at 1348). This determination 9 is “made under the traditional claim construction principles, on an element-by-element basis, and in 10 light of evidence intrinsic and extrinsic to the asserted patents.” Id. (citations omitted). While 11 Nuvoton argues that the term must be construed under § 112(f), Nuvoton provides little to no 12 evidentiary support, aside from its expert’s opinion that the term “serial engine module” does not 13 connote structure but merely refers to “a generic black box” that performs functions unrelated to the 14 claimed functions. Dkt. No. 63 at 25 (Defendants’ Responsive Brief) (citing to Dkt. No. 63-7 ¶ 61 15 (Brogioli Declaration)). Microchip, in contrast, cites to numerous technical documents and patents 16 to show that a person of ordinary skill in the art would understand the words “serial engine” to 17 connote structure. Dkt. No. 62 at 24 (Plaintiff’s Opening Brief) (citing Dkt. Nos. 62-14 (U.S. Patent 18 No. 7,475,174), 62-15 (U.S. Patent No. 6,618,385), 62-16 (U.S. Patent No. 6,990,549), 62-17 19 (Nuvoton NCU501 User’s Manual), 62-18 (Programming 32-bit Microcontrollers in C). This is 20 sufficient. Accordingly, Nuvoton failed to carry its burden and the presumption against the 21 application of § 112(f) remains unrebutted with respect to the term “serial engine module.” 22 Thus, the Court adopts the plain and ordinary meaning for the term “serial engine module.” 23 24 D. “port control module” 25 The parties dispute the construction of the term “port control module.” Microchip assets 26 that 35 U.S.C. § 112(f) does not apply and asks the Court to construe the term in accordance with 27 its plain and ordinary meaning. Dkt. No. 59-1 at 11-12 (Joint Claim Construction Statement). 1 construed as “providing port configurations that allow serial communication over the pins of a serial 2 communication bus via synchronous and asynchronous serial protocols.” Id. Nuvoton asserts that 3 the term is indefinite because the specification does not disclose any structure for performing the 4 claimed function. Id. 5 Microchip argues that, because the ’970 patent’s claims do not recite a function for the term 6 “port control module,” 35 U.S.C. § 112 does not apply. Dkt. No. 62 at 26 (Plaintiff’s Opening Brief) 7 (citing York Prods. Inc. v. Cent. Tractor Farm & Family Ctr., 99 F.3d 1568, 1574 (Fed. Cir. 1996)). 8 Nuvoton argues that York does not apply because the term “port control module” is functional, not 9 structural. Dkt. No. 63 at 22 (Defendants’ Responsive Brief). Nuvoton analogizes the instant term 10 to “ink delivery means”, a phrase the Federal Circuit found equivalent to “means for ink delivery” 11 because “ink delivery” is functional language. Id. (citing Signtech USA Ltd. v. Vutek, Inc., 174 F.3d 12 1352, 1356 (Fed. Cir. 1999)). Nuvoton then points to the claims which disclose how the “port 13 control module” can be “configured for asynchronous communication” and reconfigured “from 14 asynchronous serial communication to synchronous serial communication.” Id. Microchip argues 15 that these claimed functions of the port control module are actually performed by the serial engine 16 module. Dkt. No. 66 at 18-19 (Reply Brief). Microchip also distinguishes Signtech, stating that the 17 term “ink delivery means” recited both the word “means” and a function (“fluidly communicating 18 with an ink source”). Id. at 19. Finally, Microchip notes that Nuvoton’s expert cites to several 19 known port control circuit examples, evidencing the well-understood structure of a “port control 20 module.” Id. 21 The Court finds that defendant has not rebutted the presumption that § 112(f) does not apply. 22 The rebuttable presumption that § 112(f) does not apply can only be overcome “if the challenger 23 demonstrates that the claim term fails to ‘recite sufficiently definite structure’ or else recites 24 ‘function without reciting sufficient structure for performing that function.’” Williamson, 792 F.3d 25 at 1349. The Court agrees with plaintiff that claims 1 and 10 do not recite a function for the “port 26 control module.” York, 99 F.3d at 1574. (“Without an identified function, the term ‘means in [a] 27 claim cannot invoke 35 U.S.C. § 112[f]. Without a ‘means’ sufficiently connected to a recited 1 Tekmar Co., 115 F.3d 1576, 1583 (Fed. Cir. 1997) (finding § 112(f) “implicated only when means 2 || plus function without definite structure are present”) (emphasis in original). 3 Accordingly, the Court adopts the plain and ordinary meaning for the term “port control 4 || module.” 5 ‘ CONCLUSION

5 For the foregoing reasons and for good cause shown, the Court hereby adopts the

constructions set forth in this order.

9

IT IS SO ORDERED.

10 11 Dated: February 28, 2020

SUSAN ILLSTON

413 United States District Judge

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