bits that are currently supported by the LSI53C875A are described in this chapter. Reserved bits should not be accessed.

Table 4.1

PCI Configuration Register Map

 

 

 

 

31

 

 

 

16 15

 

 

 

0

 

 

 

Device ID

 

 

 

 

Vendor ID

 

0x00

 

 

 

 

 

 

 

 

 

 

 

 

Status

 

 

 

 

Command

 

0x04

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Class Code

 

 

 

 

 

Revision ID (Rev ID)

 

0x08

 

 

 

 

 

 

 

 

 

 

 

Not Supported

 

Header Type

 

 

 

Latency Timer

 

Cache Line Size

 

0x0C

 

 

 

 

 

 

 

 

 

 

 

 

Base Address Register Zero (I/O)

 

 

 

0x10

 

 

 

 

 

 

 

 

 

Base Address Register One (MEMORY) bits [31:0]

 

0x14

 

 

 

 

 

 

 

 

 

Base Address Register Two (SCRIPTS RAM)

 

0x18

 

 

 

 

 

 

 

 

 

 

 

 

 

Not Supported

 

 

 

0x1C

 

 

 

 

 

 

 

 

 

 

 

 

 

Not Supported

 

 

 

0x20

 

 

 

 

 

 

 

 

 

 

 

 

 

Not Supported

 

 

 

0x24

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reserved

 

 

 

0x28

 

Subsystem ID

 

 

 

Subsystem Vendor ID

 

0x2C

 

 

 

 

 

 

 

 

 

 

 

 

Expansion ROM Base Address

 

 

 

0x30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reserved

 

 

 

 

 

Capabilities Pointer

 

0x34

 

 

 

 

 

Reserved

 

 

 

0x38

Max_Lat

 

Min_Gnt

 

 

 

Interrupt Pin

 

Interrupt Line

 

0x3C

 

 

 

 

 

 

 

 

 

 

Power Management Capabilities (PMC)

 

 

 

Next Item Pointer

 

Capability ID

 

0x40

 

 

 

 

 

 

 

 

 

 

Data

 

 

Bridge Support Exten-

 

Power Management Control/Status (PMCSR)

 

0x44

 

 

sions (PMCSR_BSE)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Not Supported

 

 

 

0x48

 

 

 

 

 

 

 

 

 

 

 

 

Registers: 0x00–0x01

Vendor ID

Read Only

15

0

VID

0

0

0

1

0

0

0

0

0

0

0

0

0

0

0

0

VIDVendor ID[15:0]

This 16-bit register identifies the manufacturer of the device. The Vendor ID is 0x1000.

4-2Registers

Page 94
Image 94
LSI 53C875A technical manual Registers, Vendor ID Read Only, VIDVendor ID150