GRMON3-UM
June 2019, Version 3.1.0
74
www.cobham.com/gaisler
-ramws
<n>
Set
n
number of wait-states for rom reads and writes. (MCTRL, FTMCTRL)
SDRAM switches:
-cas
<cycles>
Programs SDRAM to either 2 or 3 cycles CAS latency and RAS/CAS delay. Default is 2. (MCTRL, FTM-
CTRL, SDCTRL, FTSDCTRL)
-ddr2cal
Run delay calibration routine on start-up before probing memory (see ddr2delay scan com-
mand).(DDR2SPA) (DDR2SPA)
-nosdram
Disable SDRAM. (MCTRL, FTMCTRL)
-ref <us>
Set the refresh reload value. (MCTRL, FTMCTRL, SDCTRL, FTSDCTRL)
-regmem
Enable registered memory. (DDR2SPA)
-trcd
<cycles>
Programs SDRAM to either 2 or 3 cycles RAS/CAS delay. Default is 2. (DDRSPA, DDR2SPA)
-trfc
<ns>
Programs the SDRAM trfc to the specified timing. (MCTRL, FTMCTRL, DDRSPA, DDR2SPA)
-trp3
Programs the SDRAM trp timing to 3. Default is 2. (MCTRL, FTMCTRL, DDRSPA, DDR2SPA)
-twr
Programs the SDRAM twr to the specified timing. (DDR2SPA)
-sddel
<value>
Set the SDCLK value. (MCTRL, FTMCTRL)
-sd2tdis
Disable SDRAM 2T signaling. By default 2T is enabled on GR740 during GRMON initialization. (GR740
SDCTRL)
6.14.2. Commands
The driver for the Debug support unit provides the commands listed in Table 6.4.
Table 6.4. MEMCTRL commands
Show or set the reset value of the memory register
Show or set the reset value of the memory register
Show or set the reset value of the memory register
Show or set the reset value of the memory register
Show or set the reset value of the memory register
Change read data input delay.
Change read skew.
Show or set reset value of the memory controller register 1
Show or set reset value of the memory controller register 2
Show or set reset value of the memory controller register 3
Show or set reset value of SDRAM controller register 1
Show or set the SDCLK delay
Commands for the SPI memory controller
6.15. Memory scrubber
The MEMSCRUB core is accessed using the command scrub, see command description in Appendix B, Command
syntax for more information. It provides commands for reading the core’s status, and performing some basic
operations such as clearing memory.
