How do I get the SDRAM Auto-refresh Duty Cycle value? Auto refresh Duty Cycle = SDRAM Refresh Time / (SDRAM Row Num core clock period time) For example, If IMS16X core clock speed 50MHz (20ns), and if SDRAM refresh time is 32ms and SDRAM Row number is 2048 then Auto-refresh Duty cycle = 32 10 / (2048 20 10 ) = 781.9                                         ⓒ2002 Copyright Infinior Microsystems.™ All Rights Reserved.