
AMD Geode™ SC2200 Processor Data Book
209
Core Logic Module - Bridge, GPIO, and LPC Registers - Function 0
32580B
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 76).
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 76).
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.
25
Writes Result in Chip Select.
When this bit is set to 1, writes to configured memory address (base address configured in
F0 Index 78h; range configured in bits [18:0]) cause DOCCS# to be asserted.
0: Disable.
1: Enable.
24
Reads Result in Chip Select.
When this bit is set to 1, reads from configured memory address (base address configured in
F0 Index 78h; range configured in bits [18:0]) cause DOCCS# to be asserted.
0: Disable.
1: Enable.
23:19
Reserved.
Must be set to 0.
18:0
DOCCS# Memory Address Range.
This 19-bit mask is used to qualify accesses on which DOCCS# is asserted by mask-
ing the upper 19 bits of the incoming PCI address (AD[31:13]).
Table 6-29. F0: PCI Header/Bridge Configuration Registers for GPIO and LPC Support (Continued)
Bit
Description
Summary of Contents for Geode SC2200
Page 8: ...8 AMD Geode SC2200 Processor Data Book List of Figures 32580B...
Page 16: ...16 AMD Geode SC2200 Processor Data Book Overview 32580B...
Page 70: ...74 AMD Geode SC2200 Processor Data Book Signal Definitions 32580B...
Page 350: ...366 AMD Geode SC2200 Processor Data Book Debugging and Monitoring 32580B...
Page 422: ...440 AMD Geode SC2200 Processor Data Book Electrical Specifications 32580B...