pc87317vul National Semiconductor Corporation, pc87317vul Datasheet - Page 39

• Manufacturer Part Number: pc87317vul
• Description: Pc87317vul/pc97317vul Superi/o Plug And Play Compatible With Acpi Compliant Controller/extender
• Manufacturer: National Semiconductor Corporation

2.4.6
This read/write register contains the data in the Program-
mable Chip Select Configuration register (see Section 2.10
"PROGRAMMABLE CHIP SELECT CONFIGURATION
REGISTERS" on page 42) indicated by the Programmable
Chip Select Configuration Index register at index 23h.
FIGURE 2-6. Programmable Chip Select Configuration
2.4.7
This read/write register enables output-pin designation and
interrupt routing. It is reset by hardware to 00h.
Bit 0 - P16 or GPIO25 Pin Select
Bit 1 - P12 or CS0 Pin Select
Bit 2 - Reserved
0
0
7
7
0: P16 is routed to I/O pin.
1: GPIO25 is routed to I/O pin. The KBC firmware
0: P12 is routed to I/O pin.
1: CS0 is routed to I/O pin. The KBC firmware may
Reserved.
0
0
6
6
may write to P16 and read it back as if the pin exist
and left open. Upon reset, this bit is initialized to 0.
write to P12 and read it back as if the pin exist and
left open. Upon reset, this bit is initialized to 0.
Programmable Chip Select Configuration Data
Register
SuperI/O Configuration 3 Register (SIOC3)
FIGURE 2-7. SIOC3 Register Bitmap
0
0
5
5
SCI Plug-and-Play Select
0
0
4
4
0
0
3
3
Data Register Bitmap
Data in a Programmable
Chip Select Configuration
Register
SCI Polarity Select
0
0
2
2
Reserved
0
0
1
1
P12 or CS0 Select
0
0
0
0
Programmable Chip Select
SuperI/O Configuration 3
Reset
Required
Reset
Required
P16 or GPIO25 Select
Configuration Data
Register (SIOC3),
Index 24h
Index 25h
Register,
Configuration
39
Bit 3 - SCI Polarity Select
Bits 7-4 - SCI Plug-and-Play Select
SCI can be routed to one of the following ISA interrupts:
IRQ1, IRQ3-IRQ12, IRQ14-IRQ15.
For details on the SCI signal, refer to Chapter 4 on page 53.
Upon reset, these bits are initialized to 0000.
Disable means the SCI is not routed to any ISA interrupt.
Unpredictable results when invalid values are written.
2.4.8
This read-only register holds the revision number of the
PC97317 chip. SRID is incremented on each tapeout.
x
7
0: SCI interrupt is active low.
1: SCI interrupt is active high.
FIGURE 2-8. PC97317 SRID Register Bitmap
x
6
PC97317 SRID Register
x
5
x
4
TABLE 2-23. SCI Routing
x
3
7 6 5 4
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
Bits
x
2
Chip Revision ID
x
1
x
0
Reset
Required
PC97317 SRID Register
Interrupt
Disable
IRQ10
IRQ11
IRQ12
IRQ14
IRQ15
Invalid
Invalid
IRQ1
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9
Index 27h
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