CS4630 datasheet(17/38 Pages) CIRRUS

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CS4630

DS445PP1

4.2

Configuration Space

The content and format of the PCI Configuration Space is given in Table 2.

Byte 3

Byte 2

Byte 1

Byte 0

Offset

Device ID: R/O, 6003h

Vendor ID: R/O, 1013h

00h

Status Register, bits 15-0:

Bit 15 Detected Parity Error: Error Bit

Bit 14 Signalled SERR: Error Bit

Bit 13 Received Master Abort: Error Bit

Bit 12 Received Target Abort: Error Bit

Bit 11 Signalled Target Abort: Error Bit

Bit 10-9 DEVSEL Timing: R/O, 10b (slow)

Bit 8 Data Parity Error Detected: Error Bit

Bit 7 Fast Back to Back Capable: R/O 0

Bit 6 User Definable Features: R/O 0

Bit 5 66MHz Bus: R/O 0

Bit 4 New Capabilities: R/O 1

Bit 3-0Reserved: R/O 0000

Reset Status State: 0410h

Write of 1 to any error bit position clears it.

Command Register, bits 15-0:

Bit 15-10: Reserved, R/O 0

Bit 9 Fast B2B Enable: R/O 0

Bit 8 SERR Enable: R/W, default 0

Bit 7 Wait Control: R/O 0

Bit 6 Parity Error Response: R/W, default 0

Bit 5 VGA Palette Snoop: R/O 0

Bit 4 MWI Enable: R/O 0

Bit 3 Special Cycles: R/O 0

Bit 2 Bus Master Enable: R/W, default 0

Bit 1 Memory Space Enable: R/W, default 0

Bit 0 IO Space Enable: R/O 0

04h

Class Code: R/O 040100h

Class 04h (multimedia device), Sub-class 01h (audio), Interface 00h

Revision ID: R/O 01h

08h

BIST: R/O 0

Header Type:

Bit 7: R/O 0

Bit 6-0: R/O 0 (type 0)

Latency Timer:

Bit 7-3: R/W,default 0

Bit 2-0: R/O 0

Cache Line Size:

R/O 0

0Ch

Base Address Register 0

Device Control Register space, memory mapped. 4 kByte size

Bit 31-12: R/W, default 0. Compare address for register space accesses

Bit 11 - 4: R/O 0, specifies 4 kByte size

Bit 3: R/O 0, Not Prefetchable (Cacheable)

Bit 2-1: R/O 00, Location Type - Anywhere in 32 bit address space

Bit 0: R/O 0, Memory space indicator

10h

Base Address Register 1

Device Memory Array mapped into host system memory space, 1 MByte size

Bit 31-20: R/W, default 0. Compare address for memory array accesses

Bit 19 - 4: R/O 0, specifies 1 MByte size

Bit 3: R/O 0, Not Prefetchable (Cacheable)

Bit 2-1: R/O 00, Location Type - Anywhere in 32 bit address space

Bit 0: R/O 0, Memory space indicator

14h

Base Address Register 2: R/O 00000000h, Unused

18h

Base Address Register 3: R/O 00000000h, Unused

1Ch

Base Address Register 4: R/O 00000000h, Unused

20h

Base Address Register 5: R/O 00000000h, Unused

24h

Cardbus CIS Pointer: R/O 00000000h, Unused

28h

Table 2. PCI Configuration Space

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