GRMON3-UM
June 2019, Version 3.1.0
112 www.cobham.com/gaisler
22. ddr2delay - syntax
ddr2delay - Change read data input delay
SYNOPSIS
ddr2delay ?subcommand? ?args...?
DESCRIPTION
ddr2delay inc ?steps?
ddr2delay dec ?steps?
ddr2delay ?value?
Use inc to increment the delay with one tap-delay for all data bytes. Use dec to decrement all delays. A
value can be specified to calibrate each data byte separately. The value is written to the 16 LSB of the
DDR2 control register 3.
ddr2delay reset
Set the delay to the default value.
ddr2delay scan
The scan subcommand will run a calibration routine that searches over all tap delays and read delay values
to find working settings. Supports only Xilinx Virtex currently
NOTE:The scan may overwrite beginning of memory.
RETURN VALUE
Command ddr2delay has no return value.
SEE ALSO
Section 6.14, “Memory controllers ”
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