Core Logic Module - Bridge, GPIO, and LPC Registers - Function 0

32579B

Table 6-29. F0: PCI Header/Bridge Configuration Registers for GPIO and LPC Support (Continued)

Bit

Description

 

 

 

6

Writes Result in Chip Select. When this bit is set to 1, writes to configured I/O address (base address configured in F0

 

Index 70h; range configured in bits [4:0]) cause IOCS1# to be asserted.

 

0:

Disable.

 

 

1:

Enable.

 

 

 

5

Reads Result in Chip Select. When this bit is set to 1, reads from configured I/O address (base address configured in F0

 

Index 70h; range configured in bits [4:0]) cause IOCS1# to be asserted.

 

0:

Disable.

 

 

1:

Enable.

 

 

 

4:0

IOCS1# I/O Address Range. This 5-bit field is used to select the range of IOCS1#.

 

00000: 1

Byte

01111: 16 Bytes

 

00001: 2

Bytes

11111: 32 Bytes

 

00011: 4

Bytes

All other combinations are reserved.

 

00111: 8

Bytes

 

 

 

 

 

 

Index 73h

 

 

Reserved

Reset Value: 00h

 

 

 

 

Index 74h-75h

 

IOCS0# Base Address Register (R/W)

Reset Value: 0000h

 

 

15:0

I/O Chip Select 0 Base Address. This 16-bit value represents the I/O base address used to enable the assertion of

 

IOCS0# (ball A10 - see PMR[23] in Table 4-2 on page 72).

 

 

This register is used in conjunction with F0 Index 76h (IOCS0# Control register).

 

 

 

 

 

 

Index 76h

 

 

IOCS0# Control Register (R/W)

Reset Value: 00h

This register is used in conjunction with F0 Index 74h (IOCS0# Base Address register).

 

 

 

 

7

I/O Chip Select 0 Positive Decode (IOCS0#).

 

 

0:

Disable.

 

 

 

1:

Enable.

 

 

 

 

6

Writes Result in Chip Select. When this bit is set to 1, writes to configured I/O address (base address configured in F0

 

Index 74h; range configured in bits [4:0]) cause IOCS0# to be asserted.

 

 

0:

Disable.

 

 

 

1:

Enable.

 

 

 

 

5

Reads Result in Chip Select. When this bit is set to 1, reads from configured I/O address (base address configured in F0

 

Index 74h; range configured in bits [4:0]) cause IOCS0# to be asserted.

 

 

0:

Disable.

 

 

 

1:

Enable.

 

 

 

 

 

4:0

IOCS0# I/O Address Range. This 5-bit field is used to select the range of IOCS0#.

 

 

00000: 1 Byte

01111: 16 Bytes

 

 

00001: 2 Bytes

11111: 32 Bytes

 

 

00011: 4 Bytes

All other combinations are reserved.

 

 

00111: 8 Bytes

 

 

 

 

 

 

 

Index 77h

 

 

Reserved

Reset Value: 00h

 

 

 

 

Index 78h-7Bh

 

DOCCS# Base Address Register (R/W)

Reset Value: 00000000h

 

 

31:0

DiskOnChip Chip Select Base Address. This 32-bit value represents the memory base address used to enable assertion

 

of DOCCS# (ball A9 or N31, see PMR[23] in Table 4-2 on page 72).

 

 

This register is used in conjunction with F0 Index 7Ch (DOCCS# Control register).

 

 

 

 

 

 

Index 7Ch-7Fh

 

DOCCS# Control Register (R/W)

Reset Value: 00000000h

This register is used in conjunction with F0 Index 78h (DOCCS# Base Address register).

 

 

 

 

 

31:27

Reserved. Must be set to 0.

 

 

 

 

 

26

DiskOnChip Chip Select Positive Decode (DOCCS#).

 

 

0:

Disable.

 

 

 

1:

Enable.

 

 

 

 

 

 

 

AMD Geode™ SC1200/SC1201 Processor Data Book

201

Page 201
Image 201
AMD SC1201, SC1200 manual Index 73h, Index 74h-75h, Index 76h, Chip Select 0 Positive Decode IOCS0#, Index 77h