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281
Western Digital Hard Disk Drive OEM Specification
11.55
Trusted Receive DMA (5Dh)
Com m and Block Output Registers
Com m and Block Input Registers
Register
7
6 5
4
3
2
1
0
Register
7
6
5
4
3
2
1
0
Data
-
-
-
-
-
-
-
-
Data
-
-
-
-
-
-
-
-
Feature
V V V V
V V V V
Error
…See Below …
Sector Count
V V V V
V V V V
Sector Count
-
-
-
-
-
-
-
-
Sector Number
V V V V
V V V V
Sector Number
-
-
-
-
-
-
-
-
Cylinder Low
V V V V
V V V V
Cylinder Low
-
-
-
-
-
-
-
-
Cylinder High
V V V V
V V V V
Cylinder High
-
-
-
-
-
-
-
-
Device/Head
-
-
-
-
-
-
-
-
Device/Head
-
-
-
-
-
-
-
-
Command
0
1 0
1
1
1
0
1
Status
…See Below …
Error Register
Status Register
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
CRC UNC
0
IDN
0
ABT T0N
AMN
BSY RDY
DF
DSC DRQ COR
IDX
ERR
0
0
0
0
0
V
0
0
0
V
0
-
-
0
0
V
Table 246 Trusted Receive DMA Command (5Dh)
The Trusted Receive DMA command reads one or more 512 byte packets from the drive. The returned packets
depend on the Security Protocol selected (feature). See Trusted Command Feature for details.
The host initializes a slave-DMA channel prior to issuing the command. The data transfers are qualified by DMARQ
and are performed by the slave-DMA channel. The device issues only one interrupt per command to indicate that
data transfer has terminated and status is available.