Table 34: AT A Command Set (1)
Class
Command
Code
FR
SC
SN
CY
DH
LBA
1
Check Power Mode
E5h or 98h
D
1
Erase Sector(s)
C0h
Y
Y
Y
Y
Y
1
1
Execute Drive Diagnostic
Flush cache
90h
E7h
D
D
2
Format track
50h
Y
Y
Y
Y
1
Identify Drive
ECh
D
1
1
1
1
1
1
1
Idle
Idle Immediate
Initialize Drive Parameters
Media Lock
Media unlock
NOP
Read Buffer
E3h or 97h
E1h or 95h
91h
DEh
DFh
00h
E4h
Y
Y
D
D
Y
D
D
D
D
1
1
Read DMA
Read Multiple
C8
C4h
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
1
Read native max address
F8h
D
1
1
Read Sector(s)
Read Verify Sector(s)
20h or 21h
40h or 41h
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
1
1
1
1
1
1
1
1
Recalibrate
Request Sense
Security Disable Password
Security Erase Prepare
Security Erase Unit
Security Freeze Lock
Security Set Password
Security Unlock
1Xh
03h
F6h
F3h
F4h
F5h
F1h
F2h
D
D
D
D
D
D
D
D
1
1
Seek
Set Features
7Xh
EFh
Y
Y
Y
Y
D
Y
1
Set max address
F9h
Y
Y
Y
Y
Y
1
1
Set Multiple Mode
Set Sleep Mode
C6h
E6h or 99h
Y
D
D
1
S.M.A.R.T.
B0h
Y
Y
Y
D
1
1
Stand By
Stand By Immediate
E2h or 96h
E0h or 94h
D
D
1
Translate Sector
87h
Y
Y
Y
Y
Y
2
Write Buffer
E8h
D
2
3
3
2
2
3
Write DMA
Write Multiple
Write Multiple w/o Erase
Write Sector(s)
Write Sector(s) w/o Erase
Write Verify
CA
C5h
CDh
30h or 31h
38h
3Ch
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
1.
FR = Features Register, SC = Sector Count Register, SN = Sector Number Register, CY = Cylinder Registers,
DH = Drive/Head Register, LBA = Logical Block Address Mode Supported (see command descriptions for use),
Y – The register contains a valid parameter for this command. For the Drive/Head Register Y means both the Drive and
head parameters are used.
D – only the Drive parameter is valid and not the head parameter C – the register contains command specific data
(see command descriptors for use).
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 1.00
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
P-120_data_sheet_PA-QxBO_Rev100.doc
Page 38 of 76
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