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AT INTERFACE and ATA COMMANDS
Table 6-4. Command Codes and Parameters (continued)
Class
1
Recalibrate
1
Read Multiple
1
Read Sector(s) (w/retry)
1
Read Sector(s) (w/o retry)
1
Read Long (w/retry)
1
Read Long (w/o retry)
1
Read Verify Sector(s) (w/retry)
1
Read Verify Sector(s) (w/o retry)
1
Seek
1
Set Features
1
Set Multiple Mode
1
Sleep Mode
1
Standby
1
Standby Immediate
2
Write Buffer
3
Write DMA (w/retry)
3
Write DMA (w/o retry)
3
Write Multiple
2
Write Sector(s) (w/retry)
2
Write Sector(s) (w/o retry)
2
Write Long (w/retry)
2
Write Long (w/o retry)
3
SMART Commands
CY = Cylinder Register
DH = Device/Head Register
FR = Feature Register
y - The register contains a valid parameter for this command. For the Device/Head
Register, y means both the device and head parameters are used.
D - Only the drive parameter is valid and not the head parameter,
6-
18 WA31273A / WA32543A / WA33203A / WA3216A / WA31083A / WA32162A
COMMAND
DESCRIPTION
SC = Sector Count Register
PARAMETER USED
CODE
FR
1xh
C4h
20h
21h
22h
23h
40h
41h
7xh
EFh
y
C6h
99h,E6h
96h,E2h
94h,E0h
E8h
CAh
CBh
C5h
*
30h
*
31h
*
32h
*
33h
*
0B0h
*
SN = Sector Number Register
SC
SN
CY
DH
D
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
y
D
y
D
D
y
D
D
D
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
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