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

32581C

Table 6-31. F0BAR1+I/O Offset: LPC Interface Configuration Registers (Continued)

Bit

 

Description

 

 

 

 

 

 

 

2

 

SMI# Polarity. This bit allows signal polarity selection of the SMI# generated from LPC.

 

 

 

0:

Active high.

 

 

 

 

 

1:

Active low.

 

 

 

 

 

 

1

 

IRQ1 Polarity. If LPC is selected as the interface source for IRQ1 (F0BAR1+I/O Offset 00h[1] = 1), this bit allows signal

 

 

polarity selection.

 

 

 

 

 

0:

Active high.

 

 

 

 

 

1:

Active low.

 

 

 

 

 

 

0

 

IRQ0 Polarity. If LPC is selected as the interface source for IRQ0 (F0BAR1+I/O Offset 00h[0] = 1), this bit allows signal

 

 

polarity selection.

 

 

 

 

 

0:

Active high.

 

 

 

 

 

1:

Active low.

 

 

 

 

 

 

 

 

 

 

Offset 08h-0Bh

SERIRQ_CNT — Serial IRQ Control Register (R/W)

Reset Value: 00000000h

 

 

 

 

 

 

31:8

 

Reserved.

 

 

 

 

 

 

 

 

 

7

 

Serial IRQ Enable.

 

 

 

 

 

0:

Disable.

 

 

 

 

 

1:

Enable.

 

 

 

 

 

 

 

 

6

 

Serial IRQ Interface Mode.

 

 

 

 

0:

Continuous.

 

 

 

 

 

1:

Quiet.

 

 

 

 

 

 

 

 

5:2

 

Number of IRQ Data Frames.

 

 

 

 

0000: 17 frames

0100: 21 frames

1000: 25 frames

1100: 29 frames

 

 

0001: 18 frames

0101: 22 frames

1001: 26 frames

1101: 30 frames

 

 

0010: 19 frames

0110: 23 frames

1010: 27 frames

1110: 31 frames

 

 

0011: 20 frames

0111: 24 frames

1011: 28 frames

1111: 32 frames

 

 

 

 

 

 

1:0

 

Start Frame Pulse Width.

 

 

 

 

 

00:

4 Clocks

 

 

 

 

 

01:

6 Clocks

 

 

 

 

 

10:

8 Clocks

 

 

 

 

 

11: Reserved

 

 

 

 

 

 

 

 

 

 

Offset 0Ch-0Fh

DRQ_SRC — DRQ Source Register (R/W)

Reset Value: 00000000h

Note: DRQx are internal signals between the Core Logic and SuperI/O modules. Some signals require additional programming to

 

make them externally accessible. See Table 4-2 "Multiplexing, Interrupt Selection, and Base Address Registers" on page 70 for

 

pin multiplexing details and Table 3-4 "Strap Options" on page 44 for LPC_ROM strap information.

 

 

 

 

 

 

31:8

 

Reserved.

 

 

 

 

 

 

 

7

 

DRQ7 Source. Selects the interface source of the DRQ7 signal.

 

 

 

0:

ISA - DRQ7 (unavailable externally).

 

 

 

 

1: LPC - LDRQ# (ball L28).

 

 

 

 

 

 

6

 

DRQ6 Source. Selects the interface source of the DRQ6 signal.

 

 

 

0:

ISA - DRQ6 (unavailable externally).

 

 

 

 

1: LPC - LDRQ# (ball L28).

 

 

 

 

 

 

5

 

DRQ5 Source. Selects the interface source of the DRQ5 signal.

 

 

 

0:

ISA - DRQ5 (unavailable externally).

 

 

 

 

1: LPC - LDRQ# (ball L28).

 

 

 

 

 

 

 

4

 

LPC BM0 Cycles. Allow LPC Bus Master 0 Cycles.

 

 

 

 

0:

Enable.

 

 

 

 

 

1:

Disable.

 

 

 

 

 

 

 

3

 

DRQ3 Source. Selects the interface source of the DRQ3 signal.

 

 

 

0:

ISA - DRQ3 (unavailable externally).

 

 

 

 

1: LPC - LDRQ# (ball L28).

 

 

 

 

 

 

 

 

 

 

 

 

 

AMD Geode™ SC3200 Processor Data Book

 

229

Page 229
Image 229
AMD SC3200 manual Reserved Serial IRQ Enable, Serial IRQ Interface Mode, Number of IRQ Data Frames