3.3.58 direct_cmd

Generates direct commands from the manager.

The direct_cmd register characteristics are:
Usage constraints
Cannot be read from. Can be written to when in CONFIG, PAUSED or READY states.
Configurations
There is only one DMC configuration.
Attributes
Offset
0x10C
Type
Write-only
Reset
0x00000000
Width
32
The following figure shows the bit assignments.
Figure 3-58 direct_cmd register bit assignments
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The following shows the bit assignments.
[31:30] Reserved_4
Unused bits
[29:28] replay_override
Defines the replay behavior for this particular command.
[27:24] Reserved_3
Unused bits
[23:16] rank_addr
Determines the target rank, each bit corresponding to a rank. If multiple ranks are selected then the command is sent to each rank in turn.
[15:12] Reserved_2
Unused bits
[11:8] direct_ba
Determines the value to be driven on the external bank group and bank address pins. For MRS commands, it is the mode register number. For all other commands, bank group (if programmed) is taken from the least significant bits, bank address is taken from the bits directly above the bank group bits.
[7:4] Reserved_1
Unused bits
[3:0] direct_cmd
Determines the command to be performed.
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