PC87393VJG National Semiconductor, PC87393VJG Datasheet - Page 122

• 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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8.0 Legacy Functional Blocks
8.1.3
The FDC supports two system operation modes: PC-AT mode and PS/2 mode (MicroChannel systems). Unless specifically
indicated otherwise, all fields in all registers are valid in both drive modes.
Offset
00h
01h
02h
03h
04h
05h
07h
07h
1. Applicable only in PS/2 Mode
2. Applicable only in Enhanced TDR Mode
3. Applicable only in PC-AT Compatible Mode
Register
FDC Bitmap Summary
Mnemonic
SRA
SRB
TDR
FIFO
DOR
MSR
DSR
DIR
DIR
CCR
TDR
3
1
1
1
2
DSKCHG
DSKCHG
Enable 3
Software
Pending
Motor
Reset
RQM
IRQ
7
Reserved
Reserved
Low Power Reserved
Reserved
Enable 2
Direction
Data I/O
Motor
6
(Continued)
Non-DMA
Execution
Enable 1
Select 0
Drive ID Information
Status
Motor
Drive
Step
5
Reserved
Reserved
Reserved
122
Command
Enable 0
Progress
WDATA
TRK0
Motor
Precompensation Delay Select
in
4
Data Bits
Bits
Head Se-
Reserved
DMAEN
Drive 3
RDATA
Busy
lect
3
Logical Drive
Exchange
Controller
WGATE
Drive 2
INDEX
DRATE 1,0 Status
Reset
Busy
2
Tape Drive Select 1,0
Tape Drive Select 1,0
Drive 1
Data Transfer Rate
MTR1
Busy
WP
1
Drive Select
DRATE1,0
Select
Direction
Density
Drive 0
MTR0
Head
Busy
High
0