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FDC37C93XAPM Datasheet(PDF) 22 Page - SMSC Corporation

Part # FDC37C93XAPM
Description  Plug and Play Compatible Ultra I/O??Controller with Soft Power Management
PDF  280 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

FDC37C93XAPM Datasheet(HTML) 22 Page - SMSC Corporation

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22
TAPE DRIVE REGISTER (TDR)
Address 3F3 READ/WRITE
This register is included for 82077 software
compatability. The robust digital data separator
used
in
the
FDC
does
not
require
its
characteristics modified for tape support.
The
contents of this register are not used internal to
the device.
The TDR is unaffected by a
software reset.
Bits 2-7 are tri-stated when
read in this mode.
Table 4 - Tape Select Bits
Table 5 - Internal 2 Drive Decode - Normal
DIGITAL OUTPUT REGISTER
DRIVE SELECT
OUTPUTS (ACTIVE LOW)
MOTOR ON OUTPUTS
(ACTIVE LOW)
Bit 7
Bit 6
Bit 5
Bit 4
Bit1
Bit 0
nDS1
nDS0
nMTR1
nMTR0
X
X
X
1
0
0
1
0
nBIT 5
nBIT 4
X
X
1
X
0
1
0
1
nBIT 5
nBIT 4
X
1
X
X
1
0
1
1
nBIT 5
nBIT 4
1
X
X
X
1
1
1
1
nBIT 5
nBIT 4
0
0
0
0
X
X
1
1
nBIT 5
nBIT 4
Table 6 - Internal 2 Drive Decode - Drives 0 and 1 Swapped
DIGITAL OUTPUT REGISTER
DRIVE SELECT OUTPUTS
(ACTIVE LOW)
MOTOR ON OUTPUTS
(ACTIVE LOW)
Bit 7
Bit 6
Bit 5
Bit 4
Bit1
Bit 0
nDS1
nDS0
nMTR1
nMTR0
X
X
X
1
0
0
0
1
nBIT 4
nBIT 5
X
X
1
X
0
1
1
0
nBIT 4
nBIT 5
X
1
X
X
1
0
1
1
nBIT 4
nBIT 5
1
X
X
X
1
1
1
1
nBIT 4
nBIT 5
0
0
0
0
X
X
1
1
nBIT 4
nBIT 5
TAPE SEL1
TAPE SEL2
DRIVE
SELECTED
0
0
1
1
0
1
0
1
None
1
2
3



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