PC87393VJG National Semiconductor, PC87393VJG Datasheet - Page 49
PC87393VJG
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PC87393VJG
Manufacturer:
NS/国半
Quantity:
20 000
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2.0 Device Architecture and Configuration
2.11.4 Drive ID Register
This read/write register is reset by hardware to 00h. This register controls bits 5 and 4 of the TDR register in the Enhanced
mode.
Location:
Type:
Usage Hints: Some BIOS implementations support automatic media sense FDDs, in which case bit 5 of the TDR register
in the Enhanced mode is interpreted as valid media sense when it is cleared to 0. If drive 0 and/or drive 1 do not support
automatic media sense, bits 1 and/or 3 of the Drive ID register should be set to 1 respectively (to indicate non-valid media
sense) when the corresponding drive is selected and the Drive ID bit is reflected on bit 5 of the TDR register in the Enhanced
mode.
Bit
Name
Reset
7-4
3-2
1-0
Bit
Reserved
Drive 1 ID. When drive 1 is accessed, these bits are reflected on bits 5-4 of the TDR register, respectively.
Drive 0 ID. When drive 0 is accessed, these bits are reflected on bits 5-4 of the TDR register, respectively.
Index F1h
R/W
7
0
6
0
Reserved
5
0
Description
49
4
0
(Continued)
3
0
Drive 1 ID
2
0
1
0
Drive 0 ID
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0
0
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