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PC87365 датащи(PDF) 186 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
номер детали PC87365
подробное описание детали  128-Pin LPC SuperI/O with System Hardware Monitoring
PDF  215 Pages
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87365 датащи(HTML) 186 Page - National Semiconductor (TI)

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11.0 Legacy Functional Blocks (Continued)
186
www.national.com
11.2.3
FDC Bitmap Summary
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.
Register
Bits
Offset
Mnemonic
76543210
00h
SRA1
1.
Applicable only in PS/2 Mode.
IRQ
Pending
Reserved
Step
TRK0
Head Se-
lect
INDEX
WP
Head
Direction
01h
SRB1
Reserved
Drive
Select 0
Status
WDATA
RDATA
WGATE
MTR1
MTR0
02h
DOR
Motor
Enable 3
Motor
Enable 2
Motor
Enable 1
Motor
Enable 0
DMAEN
Reset
Controller
Drive Select
03h
TDR
Reserved
Tape Drive Select 1,0
TDR2
2.
Applicable only in Enhanced TDR Mode.
Reserved
Drive ID Information
Logical Drive
Exchange
Tape Drive Select 1,0
04h
MSR
RQM
Data I/O
Direction
Non-DMA
Execution
Command
in
Progress
Drive 3
Busy
Drive 2
Busy
Drive 1
Busy
Drive 0
Busy
DSR
Software
Reset
Low Power
Reserved
Precompensation Delay Select
Data Transfer Rate
Select
05h
FIFO
Data Bits
07h
DIR3
3.
Applicable only in PC-AT Compatible Mode.
DSKCHG
Reserved
DIR1
DSKCHG
Reserved
DRATE 1,0 Status
High
Density
07h
CCR
Reserved
DRATE1,0



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