sc3200 Advanced Micro Devices, sc3200 Datasheet - Page 247
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sc3200
Manufacturer Part Number
sc3200
Description
Geode-tm Sc3200 Processor
Manufacturer
Advanced Micro Devices
Datasheet
1.SC3200.pdf
(447 pages)
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Core Logic Module - Bridge, GPIO, and LPC Registers - Function 0
AMD Geode™ SC3200 Processor Data Book
Offset 08h-0Bh
Offset 0Ch-0Fh
Note:
31:8
31:8
Bit
5:2
1:0
2
1
0
7
6
7
6
5
4
3
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 88 for
pin multiplexing details and Table 3-6 "Strap Options" on page 58 for LPC_ROM strap information.
Table 6-31. F0BAR1+I/O Offset: LPC Interface Configuration Registers (Continued)
Description
SMI# Polarity. This bit allows signal polarity selection of the SMI# generated from LPC.
0: Active high.
1: Active low.
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.
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.
Reserved.
Serial IRQ Enable.
0: Disable.
1: Enable.
Serial IRQ Interface Mode.
0: Continuous.
1: Quiet.
Number of IRQ Data Frames.
0000: 17 frames
0001: 18 frames
0010: 19 frames
0011: 20 frames
Start Frame Pulse Width.
00: 4 Clocks
01: 6 Clocks
10: 8 Clocks
11: Reserved
Reserved.
DRQ7 Source. Selects the interface source of the DRQ7 signal.
0: ISA - DRQ7 (unavailable externally).
1: LPC - LDRQ# (EBGA ball AL9; TEPBGA ball L28).
DRQ6 Source. Selects the interface source of the DRQ6 signal.
0: ISA - DRQ6 (unavailable externally).
1: LPC - LDRQ# (EBGA ball AL9; TEPBGA ball L28).
DRQ5 Source. Selects the interface source of the DRQ5 signal.
0: ISA - DRQ5 (unavailable externally).
1: LPC - LDRQ# (EBGA ball AL9; TEPBGA ball L28).
LPC BM0 Cycles. Allow LPC Bus Master 0 Cycles.
0: Enable.
1: Disable.
DRQ3 Source. Selects the interface source of the DRQ3 signal.
0: ISA - DRQ3 (unavailable externally).
1: LPC - LDRQ# (EBGA ball AL9; TEPBGA ball L28).
SERIRQ_CNT — Serial IRQ Control Register (R/W)
0100: 21 frames
0101: 22 frames
0110: 23 frames
0111: 24 frames
DRQ_SRC — DRQ Source Register (R/W)
1000: 25 frames
1001: 26 frames
1010: 27 frames
1011: 28 frames
Revision 5.1
1100: 29 frames
1101: 30 frames
1110: 31 frames
1111: 32 frames
Reset Value: 00000000h
Reset Value: 00000000h
247
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