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MC68HC908JL3 Datasheet, PDF (32/180 Pages) Freescale Semiconductor, Inc – Microcontrollers
Memory
Algorithm for programming
a row (32 bytes) of Flash memory
1
Set PGM bit
2 Write any data to any Flash address
within the row address range desired
3
Wait for a time, tnvs
4
Set HVEN bit
5
Wait for a time, tpgs
6
Write data to the Flash address
to be programmed
7
Wait for a time, tPROG
Completed
programming
Y
this row?
N
9
NOTE:
The time between each Flash address change (step 6 to step 6), or
the time between the last Flash address programmed
10
to clearing PGM bit (step 6 to step 9)
must not exceed the maximum programming
time, tPROG max.
11
This row program algorithm assumes the row/s
to be programmed are initially erased.
12
Clear PGM bit
Wait for a time, tnvh
Clear HVEN bit
Wait for a time, trcv
End of Programming
Figure 2-5. Flash Programming Flowchart
MC68HC908JL3E Family Data Sheet, Rev. 4
32
Freescale Semiconductor