Aboutu PSD3354 SRAM and Second Flashrom map address overlap

[zues]

Posted on October 31, 2005 at 05:29

Aboutu PSD3354 SRAM and Second Flashrom map address overlap

[zues]

Posted on May 17, 2011 at 12:08

Dear All:

memory map : 0000--7FFF ----->RAM and csiop 0000--7FFF ----->second flashrom csboot0~3 if following this code(in the main flasherom) ---> ''*((volatile unsigned char xdata *)(0x6000))=0x34'' it access SRAM or Second flahrom? if this code access SRAM,how can access second flashrom(if use VM and VM value set what)? Best Regard! Zues

[sunsy]

Posted on May 17, 2011 at 12:08

Before firstly, you must make sure wether the SRAM/CSIOP and CSBOOT is in data space or not?

the sentence you write was access the XDATA in the data space. if your SRAM/CSIOP and CSBOOT are both in data space, then their address is overlapped. you can only access the SRAM/CSIOP instaed the CSBOOT, in other words, the CSBOOT is transparent, never be accessed.