MC68HC908LJ24 Datasheet, PDF (75/464 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
FLASH Memory (FLASH)
FLASH Program Operation
Algorithm for programming
a row (64 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
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 4-3. FLASH Programming Flowchart
MC68HC908LJ24/LK24 — Rev. 2
MOTOROLA
FLASH Memory (FLASH)
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Data Sheet
75