PC8477BVF-1 datasheet(3/54 Pages) NSC

Part #	PC8477BVF-1

Description	Advanced Floppy Disk Controller

Download	54 Pages

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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3 / 54 page

List of Figures

PC8477B Functional Block Diagram

1-1

PC8477B Pin Diagram for 68 Pin PLCC and 60 Pin PQFP

1-2

IBM

Perpendicular and ISO Formats Supported by Format Command

4-1

PC8477B Data Separator Block Diagram

5-1

Read Data AlgorithmState Diagram

5-2

PC8477B Dynamic Window Margin Performance

5-3

PC8477B Dynamic Window Margin Performance with g3% ISV

5-4

Perpendicular Recording Drive RW Head and Pre-Erase Head

5-5

Clock Timing

6-1

Microprocessor Read Timing

6-2

Microprocessor Write Timing

6-3

DMA Timing

6-4

Reset Timing

6-5

Write Data Timing

6-6

Drive Control Timing

6-7

Read Data Timing

6-8

PC8477B in a PC-AT System

7-1

PC84777B Initialization

7-2

List of Tables

Register Description and Addresses

3-1

Drive Enable Values

3-2

Tape Drive Assignment Values

3-3

Write Precompensation Delays

3-4

Default Precompensation Delays

3-5

Data Rate Select Encoding

3-6

Typical Format Gap Length Values

4-1

DENSEL Encoding

4-2

DENSEL Default Encoding

4-3

Effects of WGATE and GAP

4-4

Sector Size Selection

4-5

SK Effect of Read Data Command

4-6

Result Phase Termination Values with No Error

4-7

SK Effect on Read Deleted Data Command

4-8

Maximum Recalibrate Step Pulses Based on R255 and ETR

4-9

Scan Command Termination Values

4-10

Status Register 0 Termination Codes

4-11

Set Track Register Address

4-12

Step Rate (SRT) Values

4-13

Motor Off Time (MFT) Values

4-14

Motor On Time (MNT) Values

4-15

Verify Command Result Phase Table

4-16

Nominal tICP tDRP Values

6-1

Minimum tWDW Values

6-2

PC8477B – 82077 Parameter Comparison

7-1

Density Encoding

7-2

3

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PC8477BVF-1 Datasheet(PDF) 3 Page - National Semiconductor (TI)

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