pc8477b National Semiconductor Corporation, pc8477b Datasheet - Page 3

• Manufacturer Part Number: pc8477b
• Description: Advanced Floppy Disk Controller
• Manufacturer: National Semiconductor Corporation

PC8477B Functional Block Diagram
PC8477B Pin Diagram for 68 Pin PLCC and 60 Pin PQFP
IBM
PC8477B Data Separator Block Diagram
Read Data Algorithm State Diagram
PC8477B Dynamic Window Margin Performance
PC8477B Dynamic Window Margin Performance with
Perpendicular Recording Drive R W Head and Pre-Erase Head
Clock Timing
Microprocessor Read Timing
Microprocessor Write Timing
DMA Timing
Reset Timing
Write Data Timing
Drive Control Timing
Read Data Timing
PC8477B in a PC-AT System
PC84777B Initialization
Register Description and Addresses
Drive Enable Values
Tape Drive Assignment Values
Write Precompensation Delays
Default Precompensation Delays
Data Rate Select Encoding
Typical Format Gap Length Values
DENSEL Encoding
DENSEL Default Encoding
Effects of WGATE and GAP
Sector Size Selection
SK Effect of Read Data Command
Result Phase Termination Values with No Error
SK Effect on Read Deleted Data Command
Maximum Recalibrate Step Pulses Based on R255 and ETR
Scan Command Termination Values
Status Register 0 Termination Codes
Set Track Register Address
Step Rate (SRT) Values
Motor Off Time (MFT) Values
Motor On Time (MNT) Values
Verify Command Result Phase Table
Nominal t
Minimum t
PC8477B – 82077 Parameter Comparison
Density Encoding
Perpendicular and ISO Formats Supported by Format Command
ICP
WDW
t
DRP
Values
Values
List of Figures
List of Tables
g
3% ISV
3
4-10
4-11
4-12
4-13
4-14
4-15
4-16
1-1
1-2
4-1
5-1
5-2
5-3
5-4
5-5
6-1
6-2
6-3
6-4
6-5
6-6
6-7
6-8
7-1
7-2
3-1
3-2
3-3
3-4
3-5
3-6
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-9
6-1
6-2
7-1
7-2