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FDC37C669 データシート(PDF) 32 Page - SMSC Corporation

部品番号 FDC37C669
部品情報  PC 98/99 COMPLIANT SUPER I/O FLOPPY DISK CONTROLLER WITH INFRARED SUPPORT
PDF  164 Pages
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メーカー  SMSC [SMSC Corporation]
ホームページ  http://www.smsc.com
Logo SMSC - SMSC Corporation

FDC37C669 データシート(HTML) 32 Page - SMSC Corporation

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32
Model 30 Mode
BITS 0 - 1 DATA RATE SELECT
These bits control the data rate of the floppy
controller.
See Table 13 for the settings
corresponding to the individual data rates. The
data rate select bits are unaffected by a
software reset, and are set to 250kb/s after a
hardware reset.
BIT 2 NOPREC
This bit reflects the value of NOPREC bit set in
the CCR register.
BIT 3 DMAEN
This bit reflects the value of DMAEN bit set in
the DOR register bit 3.
BITS 4 - 6 UNDEFINED
Always read as a logic "0"
BIT 7 DSKCHG
This bit monitors the pin of the same name and
reflects the opposite value seen on the pin.
7
6
5
4
3
2
1
0
DSK
CHG
0
0
0
DMAEN NOPREC DRATE
SEL1
DRATE
SEL0
RESET
COND.
N/A
0
0
0
0
0
1
0



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