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12.59 Trusted Receive DMA (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.
Table 247 Trusted Receive DMA Command (5Dh)
Command Input
Field
Description
FEATURE
SECURITY PROTOCOL
COUNT
TRANSFER LENGTH
LBA
Bit Description
27:24 Reserved
23:8 SP SPECIFIC (word)
7:0 TRANSFER LENGTH
DEVICE
Bit Description
7 Obsolete
6 N/A
5 Obsolete
4 Transport Dependent
3:0 Reserved
Command
7:0 5Dh
See Trusted Receive (5Ch) for field descriptions.
Normal Outputs
See Normal Outputs in Section 12.7 Flush Cache (E7h)
Error Outputs
See Error Outputs in Section 12.12 Idle (E3h / 97h)
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Hard Disk Drive Specification