Dear All,
Our customer connects LPDDR memory to i.MX28.
(LPDDR: NT6DM64M16BD-T3)
They tried to set Drive Strength to this LPDDR using HW_DRAM_CTL183 register of i.MX28.
However, Drive Strength of LPDDR did not change.
According to the reference manual, the following is explained.
"For LPDDR1 memories: This parameter has no meaning for this memory type."
MCIMX28RM.pdf(rev2):
- 14.8.172 DRAM Control Register 183 (HW_DRAM_CTL183) (P.1322-1323)
Is there any method of setting up or changing Drive Strength of LPDDR?
Best Regards,
Yuuki
Hi yuuki
for LPDDR memories drive strength is changed
by EMR register (bits 5-7), this is handled by
HW_DRAM_CTL185 register of i.MX28.
Best regards
igor
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Dear Igor-san,
Thank you for your support.
Is EMR register (bits 5-7) of the memory assigned to bit5-7 of HW_DRAM_CTL185 register of MX28?
Best Regards,
Yuuki
Hi Yuuki
yes, from sect. 14.8.174 DRAM Control Register 185 (HW_DRAM_CTL185) MCIMX28RM
For LPDDR1 memories: This parameter correlates to the extended mode register (EMR).
Best regards
igor