LPC47M192 datasheet(53/228 Pages) SMSC

53 / 228 page

SMSC DS – LPC47M192

Page 53

Rev. 03/30/05

DATASHEET

DUMPREG

DATA BUS

PHASE

R/W

REMARKS

SRT

HUT

HLT

SC/EOT

LOCK

GAP

WGATE

EIS EFIFO POLL

FIFOTHR

PRETRK

READ ID

DATA BUS

PHASE

R/W

REMARKS

Command

MFM

Commands

HDS

DS1

DS0

Execution

The first correct ID

information on the

Cylinder is stored in

Data Register

Result

ST0

Status information after

Command execution.

Disk status after the

Command has

completed

ST1

ST2

PERPENDICULAR MODE

DATA BUS

PHASE

R/W

REMARKS

Command

Command Codes

GAP

WGATE

INVALID CODES

DATA BUS

PHASE

R/W

REMARKS

Command

Invalid Codes

Invalid Command Codes

(NoOp – FDC goes into

Standby State)

Result

ST0

ST0 = 80H

LOCK

DATA BUS

PHASE

R/W

REMARKS

Command

LOCK

Command Codes

Result

LOCK

SC is returned if the last command that was issued was the Format command. EOT is returned if the last command

was a Read or Write.

Note:

These bits are used internally only. They are not reflected in the Drive Select pins. It is the user’s

responsibility to maintain correspondence between these bits and the Drive Select pins (DOR).

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