mc68hc908kx8 Freescale Semiconductor, Inc, mc68hc908kx8 Datasheet - Page 35

• Manufacturer Part Number: mc68hc908kx8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
Algorithm for programming
a row (32 bytes) of FLASH memory
Notes:
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
maximum.
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 Data Sheet, Rev. 2.1
Figure 2-4. FLASH Programming Flowchart
1
2
3
4
5
6
8
7
WITHIN THE ROW ADDRESS RANGE DESIRED
WRITE ANY DATA TO ANY FLASH ADDRESS
WRITE DATA TO THE FLASH ADDRESS
READ THE FLASH BLOCK
WAIT FOR A TIME, t
WAIT FOR A TIME, t
WAIT FOR A TIME, t
TO BE PROGRAMMED
PROTECT REGISTER
PROGRAMMING
SET HVEN BIT
SET PGM BIT
COMPLETED
THIS ROW?
NO
PROG
NVS
PGS
10
11
12
13
YES
FLASH Program/Read Operation
END OF PROGRAMMING
WAIT FOR A TIME, t
WAIT FOR A TIME, t
CLEAR HVEN BIT
CLEAR PGM BIT
NVH
RCV
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