FDC37B78X 查看數據表（PDF） - SMSC -> Microchip

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FDC37B78X

Enhanced Super I/O Controller with ACPI Support, Real Time Clock and Consumer IR

SMSC -> Microchip 

Because data is not transferred to the host, TC

(pin 89) cannot be used to terminate this

command. By setting the EC bit to "1", an

implicit TC will be issued to the FDC. This

implicit TC will occur when the SC value has

decremented to 0 (an SC value of 0 will verify

256 sectors). This command can also be

terminated by setting the EC bit to "0" and the

EOT value equal to the final sector to be

checked. If EC is set to "0", DTL/SC should be

programmed to 0FFH. Refer to Table 27 and

Table 28 for information concerning the values

of MT and EC versus SC and EOT value.

Definitions:

# Sectors Per Side = Number of formatted

sectors per each side of the disk.

# Sectors Remaining = Number of formatted

sectors left which can be read, including side 1

of the disk if MT is set to "1".

TABLE 28 - VERIFY COMMAND RESULT PHASE

MT

EC

SC/EOT VALUE

TERMINATION RESULT

0

0

SC = DTL

EOT ≤ # Sectors Per Side

Success Termination

Result Phase Valid

0

0

SC = DTL

EOT > # Sectors Per Side

Unsuccessful Termination

Result Phase Invalid

0

1

SC ≤ # Sectors Remaining AND

Successful Termination

EOT ≤ # Sectors Per Side

Result Phase Valid

0

1

SC > # Sectors Remaining OR

Unsuccessful Termination

EOT > # Sectors Per Side

Result Phase Invalid

1

0

SC = DTL

Successful Termination

EOT ≤ # Sectors Per Side

Result Phase Valid

1

0

SC = DTL

EOT > # Sectors Per Side

Unsuccessful Termination

Result Phase Invalid

1

1

SC ≤ # Sectors Remaining AND

Successful Termination

EOT ≤ # Sectors Per Side

Result Phase Valid

1

1

SC > # Sectors Remaining OR

Unsuccessful Termination

EOT > # Sectors Per Side

Result Phase Invalid

Note: If MT is set to "1" and the SC value is greater than the number of remaining formatted sectors

on Side 0, verifying will continue on Side 1 of the disk.

Format A Track

The Format command allows an entire track to

be formatted. After a pulse from the IDX pin is

detected, the FDC starts writing data on the disk

including gaps, address marks, ID fields, and

data fields per the IBM System 34 or 3740

format (MFM or FM respectively). The particular

values that will be written to the gap and data

field are controlled by the values programmed

into N, SC, GPL, and D which are specified by

the host during the command phase. The data

61

field of the sector is filled with the data byte

specified by D. The ID field for each sector is

supplied by the host; that is, four data bytes per

sector are needed by the FDC for C, H, R, and

N (cylinder, head, sector number and sector size

respectively).

After formatting each sector, the host must send

new values for C, H, R and N to the FDC for the

next sector on the track. The R value (sector

number) is the only value that must be changed

by the host after each sector is formatted. This

allows the disk to be formatted with

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