FDC87W21 Ver la hoja de datos (PDF) - SMSC -> Microchip

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FDC87W21

Power I/O Controller with Fast Infrared Support

SMSC -> Microchip 

FDC Commands

Command Symbol Descriptions:

C:

D:

DIR:

DS0:

DS1:

DTL:

EC:

EOT:

EFIFO:

EIS:

EOT:

FIFOTHR:

GAP:

GPL:

H:

HDS:

HLT:

HUT:

LOCK:

MFM:

MT:

N:

NCN:

ND:

OW:

PCN:

POLL:

PRETRK:

R:

RCN:

R/W:

SC:

SK:

SRT:

ST0:

ST1:

ST2:

ST3:

WG:

Cylinder number 0 - 256

Data Pattern

Step Direction

DIR = 0, step out

DIR = 1, step in

Disk Drive Select 0

Disk Drive Select 1

Data Length

Enable Count

End of Track

Enable FIFO

Enable Implied Seek

End of track

FIFO Threshold

Gap length selection

Gap Length

Head number

Head number select

Head Load Time

Head Unload Time

Lock EFIFO, FIFOTHR, PTRTRK bits prevent affected by software reset

MFM or FM Mode

Multitrack

The number of data bytes written in a sector

New Cylinder Number

Non-DMA Mode

Overwritten

Present Cylinder Number

Polling Disable

Precompensation Start Track Number

Record

Relative Cylinder Number

Read/Write

Sector/per cylinder

Skip deleted data address mark

Step Rate Time

Status Register 0

Status Register 1

Status Register 2

Status Register 3

Write gate alters timing of WE

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