
AMD Geode™ SC2200 Processor Data Book
207
Core Logic Module - Bridge, GPIO, and LPC Registers - Function 0
32580B
3
Primary IDE Controller Positive Decode.
Selects PCI positive or subtractive decoding for accesses to I/O ports 1F0h-
1F7h and 3F6h-3F7h (excluding writes to 3F7h).
0: Subtractive. Subtractively decoded IDE addresses are forwarded to the PCI slot bus. If a master abort occurs, they are
then forwarded to ISA.
1: Positive. Positively decoded IDE addresses are forwarded to the internal IDE controller and then to the IDE bus.
2
LPT3 Positive Decode.
Selects PCI positive or subtractive decoding for accesses to I/O ports 278h-27Fh.
0: Subtractive.
1: Positive.
1
LPT2 Positive Decode.
Selects PCI positive or subtractive decoding for accesses to I/O ports 378h-37Fh.
0: Subtractive.
1: Positive.
0
LPT1 Positive Decode.
Selects PCI positive or subtractive decoding for accesses to I/O ports 3BCh-3BFh
0: Subtractive.
1: Positive.
Index 5Ch
PCI Interrupt Steering Register 1 (R/W)
Reset Value: 00h
Indicates target interrupts for signals INTB# and INTA#.
Note:
The target interrupt must first be configured as level sensitive via I/O Ports 4D0h and 4D1h in order to maintain PCI interrupt
compatibility.
7:4
INTB# (Ball C26) Target Interrupt.
0000: Disable
0100: IRQ4
1000: Reserved
1100: IRQ12
0001: IRQ1
0101: IRQ5
1001: IRQ9
1101: Reserved
0010: Reserved
0110: IRQ6
1010: IRQ10
1110: IRQ14
0011: IRQ3
0111: IRQ7
1011: IRQ11
1111: IRQ15
3:0
INTA# (Ball D26) Target Interrupt.
0000: Disable
0100: IRQ4
1000: Reserved
1100: IRQ12
0001: IRQ1
0101: IRQ5
1001: IRQ9
1101: Reserved
0010: Reserved
0110: IRQ6
1010: IRQ10
1110: IRQ14
0011: IRQ3
0111: IRQ7
1011: IRQ11
1111: IRQ15
Index 5Dh
PCI Interrupt Steering Register 2 (R/W)
Reset Value: 00h
Indicates target interrupts for signals INTD# and INTC#. Note that INTD# is muxed with IDE_DATA7 (selection made via PMR[24]) and
INTC# is muxed with IOCHRDY (selection made via PMR[9,4]). See Table 4-2 on page 76 for PMR bit descriptions.
Note:
The target interrupt must first be configured as level sensitive via I/O Ports 4D0h and 4D1h in order to maintain PCI interrupt
compatibility.
7:4
INTD# ( Ball AA2) Target Interrupt.
0000: Disable
0100: IRQ4
1000: Reserved
1100: IRQ12
0001: IRQ1
0101: IRQ5
1001: IRQ9
1101: Reserved
0010: Reserved
0110: IRQ6
1010: IRQ10
1110: IRQ14
0011: IRQ3
0111: IRQ7
1011: IRQ11
1111: IRQ15
3:0
INTC# (Ball C9) Target Interrupt.
0000: Disable
0100: IRQ4
1000: Reserved
1100: IRQ12
0001: IRQ1
0101: IRQ5
1001: IRQ9
1101: Reserved
0010: Reserved
0110: IRQ6
1010: IRQ10
1110: IRQ14
0011: IRQ3
0111: IRQ7
1011: IRQ11
1111: IRQ15
Index 5Eh-5Fh
Reserved
Reset Value: 00h
Index 60h-63h
ACPI Control Register (R/W)
Reset Value: 00000000h
31:8
Reserved.
Must be set to 0.
7
SUSP_3V Shut Down PLL5.
Allow internal SUSP_3V to shut down PLL5.
0: Clock generator is stopped when internal SUSP_3V is active.
1: Clock generator continues working when internal SUSP_3V is active.
6
SUSP_3V Shut Down PLL4.
Allow internal SUSP_3V to shut down PLL4
0: Clock generator is stopped when internal SUSP_3V is active.
1: Clock generator continues working when internal SUSP_3V is active.
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...