PC87307VUL National Semiconductor, PC87307VUL Datasheet - Page 28

• Manufacturer Part Number: PC87307VUL
• Description: PC87307/PC97307 Plug and Play Compatible and PC97 Compliant SuperI/O
• Manufacturer: National Semiconductor

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Index
60h
61h
62h
63h
0030h
0031h
Index
Address Bits (15-8)
Address Bits (15-8)
Address Bits (7-0)
Address Bits (7-0)
I/O Port Base
I/O Port Base
I/O Port Base
I/O Port Base
Descriptor 0
Descriptor 0
Descriptor 1
Descriptor 1
I/O Range Check
Name
Activate
Name
TABLE 2-7. PnP I/O Space Configuration Registers
Read/write value indicating the selected I/O lower limit address bits 15-8 for I/O
descriptor 0.
Read/write value indicating the selected I/O lower limit address bits 7-0 for I/O
descriptor 0.
Read/write value indicating the selected I/O lower limit address bits 15-8 for I/O
descriptor 1.
Read/write value indicating the selected I/O lower limit address bits 7-0 for I/O
descriptor 1.
TABLE 2-6. PnP Logical Device Control Registers
For each logical device there is one Activate register that controls whether or not the
logical device is active on the ISA bus.
This is a read/write register.
Before a logical device is activated, I/O Range Check must be disabled.
Bit 0 - Logical Device Activation Control
Bits 7-1 - Reserved
This register is used to perform a conflict check on the I/O port range programmed
for use by a logical device.
This register is read/write.
Bit 0 - I/O Range Check control
Bit 1 - Enable I/O Range Check
Bits 7-2 - Reserved
0 - Do not activate the logical device.
1 - Activate the logical device.
These bits are reserved and return 0 on reads.
0 - The logical device drives 00AAh.
1 - The logical device responds to I/O reads of the logical device's assigned I/O
0 - I/O Range Check is disabled.
1 - I/O Range Check is enabled. (I/O Range Check is valid only when the logical
These bits are reserved and return 0 on reads.
range with a 0055h when I/O Range Check is enabled.
device is inactive).
Configuration
28
Definition
Definition