Lucent Technologies MN10285K User Manual

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Figure B-12 shows the flow for reprogramming (erasing and programming) the 

flash memory.

Always program after erasing is 

completed.Erasing is sometimes not 

done finely,even though PROM-

writer or onboard serial writer 

shows “PASS“in blank check. And 

in that situation the data programed 

successfully may be incorrect. 

Rewriting the data to the address 

where data has already set is forbid-

den.

As the figure shows, the write occurs after the memory is completely erased. The 

erase routine consists of three steps, first writing all zeros to the entire memory 
space, next erasing the memory, and finally reversing.

Table B-7 shows the time required for PROM and serial programming and repro-

gramming (erasing and programming).

Write 0s to entire memory

Erase

Reverse

Write user program

Erase routine

DATA-I/O LabSite DIP48-1

TBA

TBA

YDC AF200 (provisional)

—

3.5 –4 minutes

Note:

Times indicated are minimum time requirements.