82801DB Datasheet, PDF (17/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

15.1.7 SCC—Sub Class Code Register (Modem—D31:F6)......................496
15.1.8 BCC—Base Class Code Register (Modem—D31:F6) ....................496
15.1.9 HEDT—Header Type Register (Modem—D31:F6).........................496
15.1.10 MMBAR—Modem Mixer Base Address Register
(Modem—D31:F6) ..........................................................................497
15.1.11 MBAR—Modem Base Address Register (Modem—D31:F6) .........497
15.1.12 SVID—Subsystem Vendor ID (Modem—D31:F6) ..........................498
15.1.13 SID—Subsystem ID (Modem—D31:F6) .........................................498
15.1.14 CAP_PTR—Capabilities Pointer (Modem—D31:F6) ......................498
15.1.15 INTR_LN—Interrupt Line Register (Modem—D31:F6) ...................499
15.1.16 INT_PIN—Interrupt Pin (Modem—D31:F6) ....................................499
15.1.17 PID—PCI Power Management Capability ID Register
(Modem—D31:F6) ..........................................................................499
15.1.18 PC—Power Management Capabilities Register
(Modem—D31:F6) ..........................................................................500
15.1.19 PCS—Power Management Control and Status Register
(Modem—D31:F6) ..........................................................................500
15.2 AC ’97 Modem I/O Space (D31:F6) .............................................................501
15.2.1 x_BDBAR—Buffer Descriptor List Base Address Register .............503
15.2.2 x_CIV—Current Index Value Register ............................................503
15.2.3 x_LVI—Last Valid Index Register ...................................................503
15.2.4 x_SR—Status Register ...................................................................504
15.2.5 x_PICB—Position in Current Buffer Register..................................505
15.2.6 x_PIV—Prefetch Index Value Register ...........................................505
15.2.7 x_CR—Control Register .................................................................506
15.2.8 GLOB_CNT—Global Control Register............................................507
15.2.9 GLOB_STA—Global Status Register .............................................508
15.2.10 CAS—Codec Access Semaphore Register ....................................510
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Ballout Definition ..............................................................................................511
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Electrical Characteristics ..............................................................................519
17.1 Absolute Maximum Ratings .........................................................................519
17.2 Functional Operating Range ........................................................................519
17.3 DC Characteristics .......................................................................................520
17.4 AC Characteristics .......................................................................................526
17.5 Timing Diagrams..........................................................................................539
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Package Information .......................................................................................549
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Testability............................................................................................................. 551
19.1 Test Mode Description .................................................................................551
19.2 Tri-State Mode .............................................................................................552
19.3 XOR Chain Mode.........................................................................................552
19.3.1 XOR Chain Testability Algorithm Example .....................................552
A
Register Index ....................................................................................................561
B
Register Bit Index .............................................................................................580
Intel^® 82801DB ICH4 Datasheet
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