ANSI INCITS 170 : 90(R1994)

Foreword
1 Scope
1.1 Description of clauses
1.2 Application environment
2 Normative references
3 Definitions
4 Conventions
5 Physical interface
5.1 Electrical
5.2 Control signals drivers and receivers
5.3 Data line drivers and receivers
5.4 Special termination
5.5 Recommended configurations
5.6 Mechanical
6 Signal lines
6.1 Pin assignments
6.2 Control out lines (D-O)
6.3 Control in lines
6.4 Data transfer lines (D-O)
7 Commands and responses
7.1 Command structure
7.2 Commands
7.3 Responses and status
7.4 Seek (0000) (D-O)
7.5 Recalibrate (0001)
7.6 Request status (0010) (D-O)
7.7 Request configuration (0011) (D-O)
7.8 Select head group (0100) (D-x)
7.9 Control (0101) (D-O)
7.10 Data strobe offset or data recovery offset (0110)
      (D-O)
7.11 Track offset (0111) (D-O)
7.12 Initiate diagnostics (1000) (D-O)
7.13 Set unformatted bytes/sector (1001) (D-x)
      (optional)
7.14 Set high-order value (1010) (D-O) (optional)
7.15 Format (1011) (x-O) (optional)
7.16 (1100)
7.17 (1101)
7.18 Set configuration (1110) (D-O)
7.19 (1111)
8 Read, write, and format parameters
8.1 Critical read function timing parameters (D-x)
8.2 Critical write function timing parameters (D-x)
8.3 Hard-sector drive (D-x)
8.4 Soft-sector drive (D-x)
8.5 Critical read function timing parameters (x-O)
8.6 Critical write function timing parameters (x-O)
8.7 Optical format (x-O)
9 Recommendations
9.1 Normal operation command transfer
9.2 Handling command transfer errors
9.3 Configuration data
9.4 Recommended controller responses to status
      conditions
9.5 Standard status
9.6 Miscellaneous
10 Timing
10.1 Deskewing
10.2 Symbols
10.3 Terms
10.4 Grandfather
Tables
1 Cables and connectors
2 J3/P3 connector pin assignments
3 Pin assignments for control cable (J1/P1)
4 Pin assignments data cable (J2/P2)
5 Drive selection matrix
6 Summary of defined commands for all devices
7 Definition of magnetic disk command (CMD) data
8 Definition of optical disk command (CMD) data
9 Request status modifier bits
10 Magnetic disk standard status response bits
11 Magnetic disk extended status response bits
12 Optical disk standard status response bits
13 Optical disk extended status response bits
14 Optical disk device status response bits
15 Optical disk current track status response
16 Magnetic disk general configuration response bits
17 Magnetic disk general configuration response
      values
18 Magnetic disk specific configuration response bits
19 Optical disk general configuration response bits
20 Optical disk general configuration response values
21 Optical disk specific configuration response bits
22 Vendor identification codes response
23 Magnetic disk control command modifier bits
24 Optical disk control command modifier bits
25 Data strobe offset command modifiers
26 Data recovery offset command modifiers
27 Track offset command modifier bits
28 Diagnostic parameter bits
29 Set high-order value modifiers
30 Set configuration soft-switch parameter bits
31 I/O control signal states for error recovery
32 Commands used to recover from reported status
33 Commands used to recover from reported status
34 Standard status bit priority
G.1 Allowable skew
G.2 Appropriate RS-422 drivers/receivers/transceivers
Figures
1 Control signals driver/receiver combination
2 Data line driver/receiver combination
3 WRITE GATE termination
4 Optional data cable control signals termination
5 Unidirectional single-ended lines from device
6 Unidirectional single-ended lines from controller
7 J1/P1 edge connector dimensions
8 J1 header - receptacle dimensions
9 P1 header - plug dimensions
10 J2/P2 edge connector dimensions
11 J2 header - receptacle dimensions
12 P2 header - plug dimensions
13 J3/P3 edge connector dimensions
14 Typical printed circuit board connector
      orientation
15 J4/P4 frame ground connector
16 Drive select termination
17 Command data word structure
18 Word structure of configuration/status data
19 Fixed-sector format
20 Soft-sector format
21 Fixed sector optical format
22 One-bit transfer timing (to drive)
23 One-bit transfer timing (from drive)
24 Write address mark timing
25 Drive select timing
26 Typical operation(s)
27 Index pulse timing
28 Sector pulse timing
29 Read address mark timing
30 Low-speed port (0 - 15 MHz) disk read data timings
31 High-speed port (10 - 24 MHz) disk read data
      timings
32 Low-speed port (0 - 15 MHz) disk write data
      timings
33 High-speed port (10 - 24 MHz) disk write data
      timings
34 High speed port and optical timing periods
35 Fixed sector format timing - alternative 1
36 Fixed sector format timing - alternative 2
37 Soft-sector format timing
38 Normal operation - no errors or faults
39 Abnormal operation - fault detected by drive while
      attempting to execute a command
40 Abnormal operation - power turn on or fault
      detected by drive without a command or config/
      status data transfer
41 Communications transfer fault, ATTENTION
      previously negated
42 Communications transfer fault, ATTENTION
      previously asserted
43 Interface fault (<17 bits transferred, transfer
      req = 1) with ATTENTION previously negated
44 Interface fault with attention previously asserted
45 Parity error or invalid command fault with status
      data response
46 Parity error or invalid command fault with status
      data response expected by controler, and ATTENTION
      previously negated
47 Communications faults recovery procedure
48 Timing diagram for a successful spindle start
      sequence via motor command
A.1 Defect list format
D.1 Recommended fixed-sector optical format
D.2 Fixed-sector optical disk timing
F.1 Application environment
Annexes
A Magnetic disk defect list
B Disk defects
C Disk error correction
D Optical disk formats
E Transmission lines and their effects on line
      drivers
F High-speed data port considerations using ECL
G RS-422 differential components
H Disk servos
J Determining read gate assertion/negation times
K Magnetic disk formatting
L Synchronized spindles