3.3.296 t_cmd_now

Configures command signalling timing.

The t_cmd_now register characteristics are:
Usage constraints
Can be read from when in ALL states. Cannot be written to and only updated when in CONFIG, LOW-POWER or PAUSED states.
Configurations
There is only one DMC configuration.
Attributes
Offset
0x1270
Type
Read-only
Reset
0x00000000
Width
32
The following figure shows the bit assignments.
Figure 3-296 t_cmd_now register bit assignments
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The following shows the bit assignments.
[31:12] Reserved_2
Unused bits
[11:8] t_cal_now
Specifies the Command Address latency at the DDR4 device. The supported range for this bitfield is 0-10.

Note

t_cal must be zero when you use RDIMMs.
[7:4] Reserved_1
Unused bits
[3:0] t_cmd_lat_now
Specifies the number of DFI clocks after the dfi_cs_n signal is asserted until the associated command and address bus is driven. The supported range for this bitfield is 0-10.
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