FDC37B78X SMSC Corporation, FDC37B78X Datasheet - Page 42

• Manufacturer Part Number: FDC37B78X
• Description: Enhanced Super I/O Controller with ACPI Support/ Real Time Clock and Consumer IR
• Manufacturer: SMSC Corporation

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 21 - 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.
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
0
1
2
3
…
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.
interfacing to a DMA controller by means of the DRQ and nDACK
signals.
256 Bytes
512 Bytes
1024 Bytes
Sector Size
128 Bytes
…
When set to 0, the FDC operates in DMA mode,
42
DESCRIPTION
Refer to the Specify
The number of bytes