PC87393VJG National Semiconductor, PC87393VJG Datasheet - Page 38

• Manufacturer Part Number: PC87393VJG
• Description: IC, SUPER I/O DEVICE, TQFP-100
• Manufacturer: National Semiconductor

Specifications of PC87393VJG

• Data Rate: 2Mbps
• Supply Voltage Range: 3V to 3.6V
• Logic Case Style: TQFP
• No. Of Pins: 100
• Operating Temperature Range: 0°C to +70°C
• Termination Type: SMD
• Transceiver Type: Interface
• Rohs Compliant: No

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2.0 Device Architecture and Configuration
2.10.1 SuperI/O ID Register (SID)
This register contains the identity number of the chip. Members of the PC8739x family are identified by the value EAh.
Location:
Type:
2.10.2 SuperI/O Configuration 1 Register (SIOCF1)
Location:
Type:
Bit
Name
Reset
Bit
Name
Reset
5-4
3-2
Bit
7
6
1
0
Pin Function Select Lock. This bit determines if the bits that select pin functions (located in the SIOCF1, 2, 3,
4, 5, 8 and A registers) are read only or read/write. When set to 1, this bit can only be cleared by a hardware
reset.
0: Bits are R/W
1: Bits are RO.
Reserved
Number of DMA Wait States. These are R/W bits.
Bits
5 4
0 0
0 1
1 0
1 1
Number of I/O Wait States. These are R/W bits.
Bits
3 2
0 0
0 1
1 0
1 1
Software Reset. Read always returns 0. This is a R/W bit.
0: Ignored (default)
1: Resets all the logical devices that are affected by hardware reset (with the exception of Lock bits)
Global Device Enable. This bit controls the function enable of all the PC8739x logical devices, except X-Bus .
With the exception of X-Bus, it allows all logical devices to be disabled simultaneously by writing to a single bit.
This is a R/W bit.
0: All logical devices in the PC8739x are disabled (except X-Bus)
1: Each logical device is enabled according to its Activate register (Index 30h) (default)
Index 20h
RO
Index 21h
Varies per bit
Select Lock
Function
Number
Reserved
Two (default)
Six
Twelve
Number
Zero (default)
Two
Six
Twelve
Pin
7
7
0
Reserved
6
6
0
Number of DMA Wait
5
5
0
States
Description
38
4
4
1
(Continued)
Chip ID
EAh
Number of I/O Wait
3
3
0
States
2
2
0
Software
Reset
1
1
0
Device
Enable
Global
0
0
1