mc68hc908mr32 Freescale Semiconductor, Inc, mc68hc908mr32 Datasheet - Page 42

• Manufacturer Part Number: mc68hc908mr32
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Memory
42
ALGORITHM FOR PROGRAMMING
A ROW (64 BYTES) OF FLASH MEMORY
Note:
The time between each FLASH address change (step 7 to step 7), or
the time between the last FLASH address programmed
to clearing PGM bit (step 7 to step 10)
must not exceed the maximum programming
time, t
This row program algorithm assumes the row/s
to be programmed are initially erased.
PROG
max.
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
Figure 2-4. FLASH Programming Flowchart
1
2
3
4
5
6
7
8
READ THE FLASH BLOCK PROTECT REGISTER
WITHIN THE ROW ADDRESS RANGE DESIRED
WRITE ANY DATA TO ANY FLASH ADDRESS
WRITE DATA TO THE FLASH ADDRESS
WAIT FOR A TIME, t
WAIT FOR A TIME, t
WAIT FOR A TIME, t
TO BE PROGRAMMED
PROGRAMMING
SET HVEN BIT
SET PGM BIT
COMPLETED
THIS ROW?
NO
PROG
10
11
12
13
NVS
PGS
YES
END OF PROGRAMMING
WAIT FOR A TIME, t
WAIT FOR A TIME, t
CLEAR HVEN BIT
CLEAR PGM BIT
Freescale Semiconductor
NVH
RCV