Problem with SDRAM Memory

Hi All

I have some problem with SDRAM memory interface. I'am using a SHARP LH79525 ARM controller.

when i give a precharge command i see with a logical analyzer a wrong comand

WE=L CS=L RAS=H CAS=L A10=H

whitch seem to be a write command

There are some configuration that can take a write command as precharge ?

Thanks Ing Giuseppe Monteleone