SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 236

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

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Core Logic Module
Offset 04h-07h
31:21
Bit
20
19
18
17
16
15
14
13
6
5
4
3
2
1
0
Table 5-31. F0BAR1+I/O Offset: LPC Interface Configuration Registers (Continued)
Description
IRQ6 Source. Selects the interface source of the IRQ6 signal.
0: ISA - IRQ6. (Unavailable externally.)
1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)
IRQ5 Source. Selects the interface source of the IRQ5 signal.
0: ISA - IRQ5. (Unavailable externally.)
1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)
IRQ4 Source. Selects the interface source of the IRQ4 signal.
0: ISA - IRQ4. (Unavailable externally.)
1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)
IRQ3 Source. Selects the interface source of the IRQ3 signal.
0: ISA - IRQ3. (Unavailable externally.)
1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)
Reserved. Must be set to 0.
IRQ1 Source. Selects the interface source of the IRQ1 signal.
0: ISA - IRQ1. (Unavailable externally.)
1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)
IRQ0 Source. Selects the interface source of the IRQ0 signal.
0: ISA - IRQ0 (Internal signal - Connected to OUT0, System Timer, of the internal 8254 PIT.)
1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)
Reserved
INTD# Polarity. If LPC is selected as the interface source for INTD# (F0BAR1+I/O Offset 00h[20] = 1), this bit allows signal
polarity selection.
0: Active high.
1: Active low.
INTC# Polarity. If LPC is selected as the interface source for INTC# (F0BAR1+I/O Offset 00h[19] = 1), this bit allows signal
polarity selection.
0: Active high.
1: Active low.
INTB# Polarity. If LPC is selected as the interface source for INTB# (F0BAR1+I/O Offset 00h[18] = 1), this bit allows signal
polarity selection.
0:
1:
INTA# Polarity. If LPC is selected as the interface source for INTA# (F0BAR1+I/O Offset 00h[17] = 1), this bit allows signal
polarity selection.
0: Active high.
1: Active low.
Reserved. Must be set to 0.
IRQ15 Polarity. If LPC is selected as the interface source for IRQ15 (F0BAR1+I/O Offset 00h[15] = 1), this bit allows signal
polarity selection.
0: Active high.
1: Active low.
IRQ14 Polarity. If LPC is selected as the interface source for IRQ14 (F0BAR1+I/O Offset 00h[14] = 1), this bit allows signal
polarity selection.
0: Active high.
1: Active low.
IRQ13 Polarity. If LPC is selected as the interface source for IRQ13 (F0BAR1+I/O Offset 00h[13] = 1), this bit allows signal
polarity selection.
0: Active high.
1: Active low.
Active high.
Active low.
(Continued)
SERIRQ_LVL — Serial IRQ Level Control Register (R/W)
236
Reset Value: 00000000h
Revision 3.0