MC68HC908GZ8 FREESCALE [Freescale Semiconductor, Inc], MC68HC908GZ8 Datasheet - Page 43

• Manufacturer Part Number: MC68HC908GZ8
• Description: M68HC08 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Freescale Semiconductor
Note:
Algorithm for programming
a row (32 bytes) of FLASH memory
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.
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
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?
N
PROG
NVS
PGS
10
11
12
13
Y
END OF PROGRAMMING
WAIT FOR A TIME, t
WAIT FOR A TIME, t
CLEAR HVEN BIT
CLEAR PGM BIT
FLASH Memory (FLASH)
NVH
RCV
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