PC87393VJG National Semiconductor, PC87393VJG Datasheet - Page 68

• 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

www.national.com
2.0 Device Architecture and Configuration
2.19.5 X-Bus I/O Base Address High Byte Register
This register describes the high byte for the user-defined I/O zone mapped to the X-Bus. This register is reset by hardware
to 00h.
Location:
Type:
2.19.6 X-Bus I/O Base Address Low Byte Register
This register describes the low byte for the user-defined I/O zone mapped to the X-Bus. This register is reset by hardware
to 00h.
Location:
Type:
2.19.7 X-Bus I/O Size Configuration Register
This register defines the size of the user-defined I/O zone mapped to the X-Bus. This register is reset by hardware to 00h.
Location:
Type:
Bit
Name
Reset
Bit
Name
Reset
Bit
Name
Reset
7-0
7-0
7-4
3-0
Bit
Bit
Bit
User-Defined Zone Address High. Defines the higher 8 bits of the user-defined I/O block base address. The
base address should be aligned on the selected block size.
User-Defined Zone Address Low. Defines the lower 8 bits of the user-defined I/O block base address. The
base address should be aligned on the selected block size.
Reserved
User-Defined I/O Zone Size. Defines the size in bytes of the zone window. The size is defined as a power of
two using the equation: NumOfBytes = 2
window size (i.e., for a 128 byte window, the 7 LSBs of the address are zero).
Bits
3 2 1 0
0 0 0 0
. . .
1 0 0 0
Other
Index F1h
R/W
Index F2h
R/W
Index F3h
R/W
Size (Bytes)
1 (default)
256
Reserved
7
0
7
0
7
0
6
0
6
0
6
0
Reserved
5
0
5
0
5
0
n
User-Defined Zone Address High
User-Defined Zone Address Low
(User-Defined I/O Zone size). The zone must always be aligned to the
Description
Description
Description
68
4
0
4
0
4
0
(Continued)
3
0
3
0
3
0
User-Defined I/O Zone Size
2
0
2
0
2
0
1
0
1
0
1
0
0
0
0
0
0
0