pc8477b National Semiconductor Corporation, pc8477b Datasheet - Page 2

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

1 0 INTRODUCTION
2 0 PIN DESCRIPTION
3 0 REGISTER DESCRIPTION
4 0 COMMAND SET DESCRIPTION
3 1 Status Register A (SRA)
3 2 Status Register B (SRB)
3 3 Digital Output Register (DOR)
3 4 Tape Drive Register (TDR)
3 5 Main Status Register (MSR)
3 6 Data Rate Select Register (DSR)
3 7 Data Register (FIFO)
3 8 Digital Input Register (DIR)
3 9 Configuration Control Register (CCR)
3 10 Result Phase Status Registers
4 1 Command Set Summary
4 2 Command Description
3 1 1 SRA PS 2 Mode
3 1 2 SRA Model 30 Mode
3 2 1 SRB PS 2 Mode
3 2 2 SRB Model 30 Mode
3 8 1 DIR PC-AT Mode
3 8 2 DIR PS 2 Mode
3 8 3 DIR Model 30 Mode
3 9 1 CCR PC-AT and PS 2 Modes
3 9 2 CCR Model 30 Mode
4 2 1 Configure Command
4 2 2 Dumpreg Command
4 2 3 Format Command
4 2 4 Invalid Command
4 2 5 Lock Command
4 2 6 Mode Command
4 2 7 NSC Command
4 2 8 Perpendicular Mode Command
4 2 9 Read Data Command
4 2 10 Read Deleted Data Command
4 2 11 Read ID Command
4 2 12 Read A Track Command
4 2 13 Recalibrate Command
4 2 14 Relative Seek Command
3 10 1 Status Register 0 (ST0)
3 10 2 Status Register 1 (ST1)
3 10 3 Status Register 2 (ST2)
3 10 4 Status Register 3 (ST3)
Table of Contents
2
5 0 FUNCTIONAL DESCRIPTION
6 0 DEVICE DESCRIPTION
7 0 REFERENCE SECTION
5 1 Microprocessor Interface
5 2 Modes of Operation
5 3 Controller Phases
5 4 Data Separator
5 5 Crystal Oscillator
5 6 Dynamic Window Margin Performance
5 7 Perpendicular Recording Mode
5 8 Data Rate Selection
5 9 Write Precompensation
5 10 Low Power Mode Logic
5 11 Reset Operation
6 1 DC Electrical Characteristics
6 2 AC Electrical Characteristics
7 1 Mnemonic Definitions for PC8477B Commands
7 2 PC8477B Enhancements vs 82077AA
7 3 PC8477B Interface in a PC-AT
7 4 Software Initialization Sequence
7 5 PC8477B PC8477A differences
7 6 Revision History
4 2 15 Scan Commands
4 2 16 Seek Command
4 2 17 Sense Drive Status Command
4 2 18 Sense Interrupt Command
4 2 19 Set Track Command
4 2 20 Specify Command
4 2 21 Verify Command
4 2 22 Version Command
4 2 23 Write Data Command
4 2 24 Write Deleted Data Command
5 3 1 Command Phase
5 3 2 Execution Phase
5 3 3 Result Phase
5 3 4 Idle Phase
5 3 5 Drive Polling Phase
6 2 1 AC Test Conditions
6 2 2 Clock Timing
6 2 3 Microprocessor Read Timing
6 2 4 Microprocessor Write Timing
6 2 5 DMA Timing
6 2 6 Reset Timing
6 2 7 Write Data Timing
6 2 8 Drive Control Timing
6 2 9 Read Data Timing
5 3 2 1 DMA Mode FIFO Disabled
5 3 2 2 DMA Mode FIFO Enabled
5 3 2 3 Interrupt Mode FIFO Disabled
5 3 2 4 Interrupt Mode FIFO Enabled
5 3 2 5 Software Polling