K6602637
Rev.3
02.27.01
- 35 -
6
66
6
.3.2 Commands
6.3.2.1 Command Summary
Commands are issued to the device first loading the Command Block Registers with any information
needed for the command. Then a command code is written to the Command Register, which starts
the execution of the command.
Table 6.4 Command Codes
Command Description
Protocol
Class
Code
Parameter Setup
FR
SC
SN
CY
DH
Read Commands
Read Buffer
PI
1
E4h
D
Read Sectors
PI
1
20h, 21h
V
V
V
V
Read Long
PI
1
22h, 23h
V
V
V
V
Read Multiple
PI
1
C4h
V
V
V
V
Read DMA
DM
1
C8h, C9h
V
V
V
V
Read Verify
ND
1
40h, 41h
V
V
V
V
Write Commands
Write Buffer
PO
2
E8h
D
Write Sectors
PO
2
30h, 31h
V
V
V
V
Write Long
PO
2
32h, 33h
V
V
V
V
Write Multiple
PO
3
C5h
V
V
V
V
Write DMA
DM
3
CAh,CBh
V
V
V
V
Format Track
PO
2
50h
V
V
V
Flush Cache
ND
1
E7h
D
Seek Commands
Recalibrate
ND
1
1Xh
D
Seek
ND
1
7Xh
V
V
V
Mode Set/Check, Diagnostic
Execute Device Diagnostic
ND
1
90h
D
Initialize Device Parameters
ND
1
91h
V
V
Identify Device
PI
1
ECh
D
Set Features
ND
1
EFh
V
D
Set Multiple Mode
ND
1
C6h
V
D
Power Control
Check Power Mode
ND
1
98h, E5h
V
D
Idle
ND
1
97h, E3h
V
D
Idle Immediate
ND
1
95h, E1h
D
Sleep
ND
1
99h, E6h
D
Standby
ND
1
96h, E2h
V
D
Standby Immediate
ND
1
94h, E0h
D