PC87309 datasheet(5/192 Pages) NSC

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Table of Contents

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3.3.1

Status Register A (SRA) .............................................................................................. 38

3.3.2

Status Register B (SRB) .............................................................................................. 39

3.3.3

Digital Output Register (DOR) ..................................................................................... 39

3.3.4

Tape Drive Register (TDR) .......................................................................................... 41

3.3.5

Main Status Register (MSR) ........................................................................................ 42

3.3.6

Data Rate Select Register (DSR) ................................................................................ 43

3.3.7

Data Register (FIFO) ................................................................................................... 43

3.3.8

Digital Input Register (DIR) .......................................................................................... 44

3.3.9

Configuration Control Register (CCR) ......................................................................... 45

3.4

THE PHASES OF FDC COMMANDS ....................................................................................... 45

3.4.1

Command Phase ......................................................................................................... 45

3.4.2

Execution Phase .......................................................................................................... 45

3.4.3

Result Phase ............................................................................................................... 47

3.4.4

Idle Phase .................................................................................................................... 47

3.4.5

Drive Polling Phase ..................................................................................................... 48

3.5

THE RESULT PHASE STATUS REGISTERS .......................................................................... 48

3.5.1

Result Phase Status Register 0 (ST0) ......................................................................... 48

3.5.2

Result Phase Status Register 1 (ST1) ......................................................................... 49

3.5.3

Result Phase Status Register 2 (ST2) ......................................................................... 49

3.5.4

Result Phase Status Register 3 (ST3) ......................................................................... 50

3.6

FDC REGISTER BITMAPS ....................................................................................................... 51

3.6.1

Standard ...................................................................................................................... 51

3.6.2

Result Phase Status .................................................................................................... 52

3.7

COMMAND SET ....................................................................................................................... 53

3.7.1

Abbreviations Used in FDC Commands ...................................................................... 54

3.7.2

The CONFIGURE Command ...................................................................................... 55

3.7.3

The DUMPREG Command ......................................................................................... 55

3.7.4

The FORMAT TRACK Command ............................................................................... 56

3.7.5

The INVALID Command .............................................................................................. 58

3.7.6

The LOCK Command .................................................................................................. 60

3.7.7

The MODE Command ................................................................................................. 60

3.7.8

The NSC Command .................................................................................................... 62

3.7.9

The PERPENDICULAR MODE Command ................................................................. 62

3.7.10

The READ DATA Command ....................................................................................... 64

3.7.11

The READ DELETED DATA Command ...................................................................... 66

3.7.12

The READ ID Command ............................................................................................. 67

3.7.13

The READ A TRACK Command ................................................................................. 68

3.7.14

The RECALIBRATE Command ................................................................................... 68

3.7.15

The RELATIVE SEEK Command ................................................................................ 69

3.7.16

The SCAN EQUAL, the SCAN LOW OR EQUAL and the SCAN HIGH OR EQUAL

Commands .................................................................................................................. 69

3.7.17

The SEEK Command .................................................................................................. 70

3.7.18

The SENSE DRIVE STATUS Command .................................................................... 71

3.7.19

The SENSE INTERRUPT Command .......................................................................... 71

3.7.20

The SET TRACK Command ........................................................................................ 72

3.7.21

The SPECIFY Command ............................................................................................ 73

3.7.22

The VERIFY Command ............................................................................................... 74

PC87309 Datasheet(PDF) 5 Page - National Semiconductor (TI)

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