CS4281 Datasheet, PDF (14/36 Pages) Cirrus Logic – CrystalClear PCI Audio interface

CS4281
CrystalClear™ PCI Audio Interface
Byte 3
Byte 2
Byte 1
Byte 0
Subsystem ID
Subsystem Vendor ID
R/O 0000h default, see Subsystem ID section
R/O 0000h default, see Subsystem ID section
Expansion ROM Base Address: R/O 00000000h, Unused
Reserved: R/O 000000h
Reserved: R/O 00000000h
Cap_Ptr: R/O, 40h
Max_Lat: R/O 18h
Min_Gnt: R/O 04h
24 × 0.25 µS = 6 µS
4 × 0.25 µS = 1 µS
PMC
Bit 15: PME# from D3cold: R/O 0 default
Bit 14: PME# from D3hot: R/O 1
Bit 13: PME# from D2: R/O 1
Bit 12: PME# from D1: R/O 1
Bit 11: PME# from D0: R/O 1
Bit 10: D2 support: R/O 1
Bit 9: D1 support: R/O 1
Bit 8-6: Vaux Power: R/O 000 default
Bit 5: Device Specific Init: R/O 1
Bit 4: Auxiliary Power: R/O 0 default
Bit 3: PME# clock: R/O 0
Bit 2-0: Version: R/O 001
Data: R/O 0
PMCSR_BSE: R/O 0
Interrupt Pin:
R/O 01h, INTA used
Interrupt Line:
R/W, default 0
Next Item Pointer:
R/O 00h
Capability ID:
R/O 01h
PMCSR
Bit 15: PME# status: R/W 0
Bit 14-13: Data scale: R/O 00
Bit 12-9: Data select: R/O 0000
Bit 8: PME_En: R/W 0
Bit 7-2: Reserved: R/O 000000
Bit 1-0: Power state: R/W 00
Configuration Write Protect (CWPR): R/W 00000000h
Reserved
GPIO Pin Interface (GPIOR): R/W* 00000000h
Serial Port Power Management & Control (SPMC): R/W* 00000000h
Configuration Load Register (CFLR): R/W* 00000000h default^†
BIOS Flags: R/W* 00h ISA IRQC: R/W* 00h ISA IRQB: R/W* 00h ISA IRQA: R/W* 00h
Reserved
Subsystem ID:
Subsystem Vendor ID:
R/W* 0000h default^†, see Subsystem ID section
R/W* 0000h default^†, see Subsystem ID section
* Write capability controlled by CWPR setting.
† _{Power-up values could be loaded from external EEPROM.}
Table 2. PCI Configuration Space (cont.)
Offset
2Ch
30h
34h
38h
3Ch
40h
44h
E0h
E4h
E8h
ECh
F0h
F4h
F8h
FCh
CIRRUS LOGIC PRODUCT DATA SHEET
14
DS308PP4