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200
Revision 1.1
G
Core Logic Module
(Continued)
5.4.1.2
F0 Index 14h, Base Address Register 1 (F0BAR1) points to
the base address of the register space that contains the
configuration registers for LPC support. Table 5-31 gives
the bit formats of the I/O mapped registers accessed
through F0BAR1.
LPC Support Registers
The LPC Interface supports all features described in the
LPC bus specification 1.0, with the following exceptions:
Only 8- or 16-bit DMA, depending on channel number.
Does not support the optional larger transfer sizes.
Only one external DRQ pin.
Table 5-31. F0BAR1+I/O Offset xxh: LPC Interface Configuration Registers
Bit
Description
Offset 00h-03h
SERIRQ_SRC — Serial IRQ Source Register (R/W)
Reset Value: 00000000h
31:21
20
Reserved.
INTD Source.
Selects the interface source of the INTD# signal.
0: PCI (INTD#, ball V24).
1: LPC (SERIRQ, ball A24) and program PMR[16] = 1.
INTC Source.
Selects the interface source of the INTC# signal.
0: PCI (INTC#, ball Y24) and program PMR[4] =1.
1: LPC (SERIRQ, ball A24) and program PMR[16] = 1.
INTB Source.
Selects the interface source of the INTB# signal.
0: PCI (INTB#, ball W24).
1: LPC (SERIRQ, ball A24) and program PMR[16] = 1.
INTA Source.
Selects the interface source of the INTA# signal.
0: PCI (INTA#, ball AD26).
1: LPC (SERIRQ, ball A24) and program PMR[16] = 1.
Reserved.
Set to 0.
IRQ15 Source.
Selects the interface source of the IRQ15 signal.
0: ISA (IRQ15, ball AF19) and program PMR[18] = 0 and PMR[8] = 1.
1: LPC (SERIRQ, ball A24) and program PMR[16] = 1.
IRQ14 Source.
Selects the interface source of the IRQ14 signal.
0: ISA (IRQ14, ball AC6).
1: LPC (SERIRQ, ball A24) and program PMR[16] = 1.
IRQ13 Source.
Selects the interface source of the internal IRQ13 signal.
0: ISA (IRQ13 internal signal - An input from the CPU indicating that a floating point error has been detected and that inter-
nal INTR should be asserted).
1: LPC (SERIRQ, ball A24) and program PMR[16] = 1.
IRQ12 Source.
Selects the interface source of the IRQ12 signal.
0: ISA (IRQ12, unavailable externally).
1: LPC (SERIRQ, ball A24) and program PMR[16] = 1.
IRQ11 Source.
Selects the interface source of the IRQ11 signal.
0: ISA (IRQ11, unavailable externally).
1: LPC (SERIRQ, ball A24) and program PMR[16] = 1.
IRQ10 Source.
Selects the interface source of the IRQ10 signal.
0: ISA (IRQ10, unavailable externally).
1: LPC (SERIRQ, ball A24) and program PMR[16] = 1.
IRQ9 Source.
Selects the interface source of the IRQ9 signal.
0: ISA (IRQ9, unavailable externally).
1: LPC (SERIRQ, ball A24) and program PMR[16] = 1.
IRQ8# Source.
Selects the interface source of the IRQ8# signal.
0: ISA (IRQ8# internal signal - Connected to internal RTC).
1: LPC (SERIRQ, ball A24) and program PMR[16] = 1.
IRQ7 Source.
Selects the interface source of the IRQ7 signal.
0: ISA (IRQ7, unavailable externally).
1: LPC (SERIRQ, ball A24) and program PMR[16] = 1.
19
18
17
16
15
14
13
12
11
10
9
8
7