MC908AB32CFUE Datasheet, PDF (65/392 Pages) Freescale Semiconductor, Inc – Microcontrollers

FLASH Memory
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 address}
within the row address range desired
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
programming
Y
this row?
N
NOTE:
10
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 4-2. FLASH Programming Flowchart
MC68HC908AB32 — Rev. 1.1
Freescale Semiconductor
FLASH Memory
Technical Data
65