3.3.306 wrlvl_control_now

Determines the DMC behavior during write training operations. See the PHY training interface section of the Integration Manual for more information on PHY training.

The wrlvl_control_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.
There is only one DMC configuration.
The following figure shows the bit assignments.
Figure 3-306 wrlvl_control_now register bit assignments
To view this graphic, your browser must support the SVG format. Either install a browser with native support, or install an appropriate plugin such as Adobe SVG Viewer.

The following shows the bit assignments.
[31:20] Reserved_7
Unused bits
[19:16] wrlvl_pattern_now
Program the value to be driven onto dfi_lvl_pattern during training. The DMC ignores the value. For default DFI encodings see the DFI specification [5]. The supported range for this bitfield is 0-15.
[15] Reserved_6
Unused bits
[14] wrlvl_err_en_now
If enabled replay commands because of dfi_err during training.
[13] refresh_dur_wrlvl_now
Program to enable AUTOREFRESH commands to be generated during training operations. When enabled (1'b1), the DMC exits a training sequence to perform refresh.
[12] wrlvl_refresh_now
Program to enable or disable issue of an AUTOREFRESH command prior to performing write leveling training.
[11] Reserved_5
Unused bits
[10:9] Reserved_4
Unused bits
[8] Reserved_3
Unused bits
[7:5] Reserved_2
Unused bits
[4] wrlvl_setup_now
Program the command that sets up the DRAM for write leveling training.
[3:1] Reserved_1
Unused bits
[0] wrlvl_mode_now
Program the mode used for write leveling training.
Non-ConfidentialPDF file icon PDF versionARM 100000_0001_00_en
Copyright © 2014 ARM. All rights reserved.