Flash program

shermantec · ‎2003-04-29

Posted on April 30, 2003 at 06:32

Flash program

shermantec · ‎2003-04-16

Posted on April 16, 2003 at 09:26

Hello ,

I need to reprogram the Flash on the ST7 a lot of times , how can i do this in the HDFlash that can be reprogram only 100 times .

Is there any possiblity to do this with emulated eeprom or other solution .

Latino

stephanie · ‎2003-04-29

Posted on April 30, 2003 at 06:32

It would be better then for you to change your product: XFlash family can be reprogrammed 10000 times.

For HDFlash, that means that at least 100 times are guaranteed. Some more times (but how much??) will work but ST can not guarantee it and how much.

For the emulated EEPROM data in HDFLash, 1 interesting formula is given in the Flash Programming manual:

Example: if you need to store 20 byte EEPROM data (value between 0x00 and 0xFF) and you use sector 1 (4kbyte) for doing that, you can write this datas according to this formula:

(number of max. HD-flash erase cycles) * (size of sector) / (number of bytes which should be stored) / (memory size you need to store one byte of EEPROM data)

in this example this means:

100 *4096 / 20 /2 => so you can write this data about 10k times!

[ This message was edited by: stef on 30-04-2003 10:20 ]