MC908JL8CDWE Datasheet, PDF (37/212 Pages) Freescale Semiconductor, Inc – Microcontrollers

Algorithm for programming
a row (32 bytes) of FLASH memory
1
Set PGM bit
2 _{Read the FLASH block protect register}
3 Write any data to any FLASH location
within the address range of the row to
be programmed
4
Wait for a time, t_nvs
5
Set HVEN bit
6
Wait for a time, t_pgs
FLASH Program Operation
7
Write data to the FLASH address
to be programmed
8
Wait for a time, t_prog
Completed
Y
programming
this row?
N
10
NOTE:
The time between each FLASH address change (step 7 to step 7), or
the time between the last FLASH address programmed
11
to clearing PGM bit (step 7 to step 10)
must not exceed the maximum programming
time, t_prog max.
12
This row program algorithm assumes the row/s
to be programmed are initially erased.
13
Clear PGM bit
Wait for a time, t_nvh
Clear HVEN bit
Wait for a time, t_rcv
End of programming
Figure 2-4. FLASH Programming Flowchart
MC68HC908JL8/JK8 • MC68HC08JL8/JK8 • MC68HC908KL8 Data Sheet, Rev. 3.1
Freescale Semiconductor
37