AnsweredAssumed Answered

LPC18xx refresh time

Question asked by wt setoh on Nov 26, 2018
Latest reply on Nov 28, 2018 by wt setoh

Hi all,

hope you can help.

I'm using LPC18xx with MT48LC4M32B2P-6A IT

re the following

/* Keil SDRAM timing and chip Config */
STATIC const IP_EMC_DYN_CONFIG_T MT48LC4M32_config = {
     EMC_NANOSECOND(64000000 / 4096),     /* Row refresh time */

 

since for automotive part,  the datasheet has indicated trefAT 16 ms max compared with tref 64ms for other options.

https://www.micron.com/parts/dram/sdram/mt48lc4m32b2b5-6a-it

 

Q.  should the calculation be changed as follows?

EMC_NANOSECOND(256000000 / 4096),     /* Row refresh time */

 

thanks and rgds,  setoh.

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