fdc37m707 Standard Microsystems Corp., fdc37m707 Datasheet - Page 37
fdc37m707
Manufacturer Part Number
fdc37m707
Description
Fdc37m707 Enhanced Super I/o Controller With Wake-up Features
Manufacturer
Standard Microsystems Corp.
Datasheet
1.FDC37M707.pdf
(194 pages)
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H/HDS
HLT
HUT
LOCK
MFM
MT
N
NCN
ND
SYMBOL
Head Address
Head Load
Time
Head Unload
Time
MFM/FM
Mode Selector
Multi-Track
Selector
Sector Size
Code
New Cylinder
Number
Non-DMA
Mode Flag
NAME
Table 17 - Description of Command Symbols
Selected head: 0 or 1 (disk side 0 or 1) as encoded in the sector ID
field.
The time interval that FDC waits after loading the head and before
initializing a read or write operation. Refer to the Specify command
for actual delays.
The time interval from the end of the execution phase (of a read or
write command) until the head is unloaded. Refer to the Specify
command for actual delays.
Lock defines whether EFIFO, FIFOTHR, and PRETRK parameters
of the CONFIGURE COMMAND can be reset to their default values
by a "software Reset". (A reset caused by writing to the appropriate
bits of either tha DSR or DOR)
A one selects the double density (MFM) mode. A zero selects single
density (FM) mode.
When set, this flag selects the multi-track operating mode. In this
mode, the FDC treats a complete cylinder under head 0 and 1 as a
single track. The FDC operates as this expanded track started at
the first sector under head 0 and ended at the last sector under
head 1. With this flag set, a multitrack read or write operation will
automatically continue to the first sector under head 1 when the
FDC finishes operating on the last sector under head 0.
This specifies the number of bytes in a sector. If this parameter is
"00", then the sector size is 128 bytes.
transferred is determined by the DTL parameter. Otherwise the
sector size is (2 raised to the "N'th" power) times 128. All values up
to "07" hex are allowable. "07"h would equal a sector size of 16k. It
is the user's responsibility to not select combinations that are not
possible with the drive.
N
00
01
02
03
…
07
The desired cylinder number.
When set to 1, indicates that the FDC is to operate in the non-DMA
mode. In this mode, the host is interrupted for each data transfer.
When set to 0, the FDC operates in DMA mode, interfacing to a
DMA controller by means of the DRQ and nDACK signals.
Sector Size
128 Bytes
256 Bytes
512 Bytes
1024 Bytes
16,384 Bytes
37
DESCRIPTION
The number of bytes
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