FDC37C669_07 SMSC [SMSC Corporation], FDC37C669_07 Datasheet - Page 42
FDC37C669_07
Manufacturer Part Number
FDC37C669_07
Description
PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.FDC37C669_07.pdf
(164 pages)
- Current page: 42 of 164
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GAP
GPL
H/HDS
HLT
HUT
LOCK
MFM
MT
SYMBOL
Gap Length
Head Address
Head Load Time
Head Unload
Time
MFM/FM Mode
Selector
Multi-Track
Selector
NAME
Table 18 - Description of Command Symbols
Alters Gap 2 length when using Perpendicular Mode.
The Gap 3 size. (Gap 3 is the space between sectors excluding
the VCO synchronization field).
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.
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 the 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.
42
DESCRIPTION
Refer to the Specify
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