82077AA Datasheet, PDF (3/62 Pages) Intel Corporation – CHMOS SINGLE-CHIP FLOPPY DISK CONTROLLER

CONTENTS
PAGE
5 0 COMMAND SET DESCRIPTIONS
(Continued)
5 2 Control Commands
30
5 2 1 Read ID
30
5 2 2 Recalibrate
30
5 2 3 Seek
30
5 2 4 Sense Interrupt Status
31
5 2 5 Sense Drive Status
31
5 2 6 Specify
31
5 2 7 Configure
32
5 2 8 Version
32
5 2 9 Relative Seek
32
5 2 10 DUMPREG
33
5 2 11 Perpendicular Mode
Command
33
5 3 Command Set Enhancements
34
5 3 1 Perpendicular Mode
34
5 3 2 Lock
35
5 3 3 Enhanced DUMPREG
Command
35
6 0 STATUS REGISTER ENCODING
36
6 1 Status Register 0
36
6 2 Status Register 1
36
6 3 Status Register 2
37
6 4 Status Register 3
37
7 0 COMPATIBILITY
37
7 1 Register Set Compatibility
37
7 2 PS 2 vs AT vs Model 30 Mode
38
7 2 1 PS 2 Mode
38
7 2 2 PC AT Mode
38
7 2 3 Model 30 Mode
38
7 3 Compatibility with the FIFO
38
7 4 Drive Polling
39
CONTENTS
PAGE
8 0 PROGRAMMING GUIDELINES
39
8 1 Command and Result Phase
Handshaking
39
8 2 Initialization
40
8 3 Recalibrates and Seeks
42
8 4 Read Write Operations
43
8 5 Formatting
43
8 6 Verifies
46
9 0 DESIGN APPLICATIONS
46
9 1 PC AT Floppy Disk Controller
46
9 1 1 PC AT Floppy Disk Controller
Architecture
46
9 1 2 82077AA PC AT Solution
48
9 2 3 5 Drive Interfacing
50
9 2 1 3 5 Drives Under the AT
Mode
50
9 2 2 3 5 Drives Under the PS 2
Modes
51
9 2 3 Combining 5 25 and 3 5
Drives
51
10 0 D C SPECIFICATIONS
52
10 1 Absolute Maximum Ratings
52
10 2 D C Characteristics
52
11 0 A C SPECIFICATIONS
53
12 0 DATA SEPARATOR
CHARACTERISTICS FOR FLOPPY
DISK MODE
60
13 0 DATA SEPARATOR
CHARACTERISTICS FOR TAPE
DRIVE MODE
61
14 0 82077AA 68-LEAD PLCC
PACKAGE THERMAL
CHARACTERISTICS
61
15 0 REVISION SUMMARY
62
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