External SRAM troubles

bhines · ‎2010-01-12

Posted on January 12, 2010 at 12:06

bhines · ‎2011-05-17

Posted on May 17, 2011 at 09:45

I have a 512k by 8 bit SRAM interfaced to an STR912FW44 via 8-bit multiplexed mode using CS0. Whenever I write a byte to it, it writes the same byte into 4 locations in the SRAM two bytes 10 hex apart in two places 100 hex apart. What am I doing wrong? The compiler is keil C.

sfouques9 · ‎2011-05-17

Posted on May 17, 2011 at 09:45

Hi All,

Does anyone found why CS0 is activated 4 times in 8bits (or even 16!!) mux mode when writing a single byte at a single location ??? I did not found any chronogram for this mode ??

With the same configuration on CS1, CS1 is activated correctly one single time ?!!

regards,

lxu · ‎2011-05-17

Posted on May 17, 2011 at 09:45

Do you define the SRAM address like this (*( volatile char*) 0x30000000)?