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FDC37M607 Datasheet(PDF) 61 Page - SMSC Corporation

Part # FDC37M607
Description  ENHANCED SUPER I/O CONTROLLER WITH INFRARED SUPPORT
PDF  182 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

FDC37M607 Datasheet(HTML) 61 Page - SMSC Corporation

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61
pulses. The HLT (Head Load Time) defines the
time between when the Head Load signal goes
high and the read/write operation starts. The
values
change
with
the
data
rate
speedselection and are documented in Table 29.
The values are the same for MFM and FM.
Table 29 - Drive Control Delays (ms)
HUT
SRT
2M
1M
500K
300K
250K
2M
1M
500K
300K
250K
0
1
..
E
F
64
4
..
56
60
128
8
..
112
120
256
16
..
224
240
426
26.7
..
373
400
512
32
..
448
480
4
3.75
..
0.5
0.25
8
7.5
..
1
0.5
16
15
..
2
1
26.7
25
..
3.33
1.67
32
30
..
4
2
HLT
2M
1M
500K
300K
250K
00
01
02
..
7F
7F
64
0.5
1
..
63
63.5
128
1
2
..
126
127
256
2
4
..
252
254
426
3.3
6.7
..
420
423
512
4
8
.
504
508
The choice of DMA or non-DMA operations is
made by the ND bit. When this bit is "1", the
non-DMA mode is selected, and when ND is "0",
the DMA mode is selected. In DMA mode, data
transfers are signalled by the FDRQ pin. Non-
DMA mode uses the RQM bit and the FINT pin
to signal data transfers.
Configure
The Configure command is issued to select the
special features of the FDC.
A Configure
command need not be issued if the default
values
of
the
FDC
meet
the
system
requirements.
Configure Default Values:
EIS - No Implied Seeks
EFIFO - FIFO Disabled
POLL - Polling Enabled
FIFOTHR - FIFO Threshold Set to 1 Byte
PRETRK - Pre-Compensation Set to Track 0
EIS - Enable Implied Seek. When set to "1", the
FDC will perform a Seek operation before
executing a read or write command. Defaults to
no implied seek.
EFIFO - A "1" disables the FIFO (default). This
means data transfers are asked for on a byte-
by-byte basis. Defaults to "1", FIFO disabled.
The threshold defaults to "1".
POLL - Disable polling of the drives. Defaults to
"0", polling enabled.
When enabled, a single
interrupt is generated after a reset. No polling is



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