mc68hc908mr8 Freescale Semiconductor, Inc, mc68hc908mr8 Datasheet - Page 60

• Manufacturer Part Number: mc68hc908mr8
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

FLASH Memory
4.3 FLASH Programming Algorithm
Technical Data
60
NOTE:
The time between each FLASH address change, or the time between
the last FLASH address programmed to clear the PGM bit, must not
exceed the maximum programming time, t
Programming and erasing of FLASH locations cannot be performed by
code being executed from the FLASH memory. While these operations
must be performed in the order shown, other unrelated operations may
occur between the steps. Do not exceed t
Memory
Refer to
FLASH memory.
10. Clear the PGM bit.
11. Wait for a time, t
12. Clear the HVEN bit.
13. After a time, t
4. Wait for a time, t
5. Set the HVEN bit.
6. Wait for a time, t
7. Write data to the FLASH address to be programmed.
8. Wait for a time, t
9. Repeat step 7 and step 8 until all the bytes within the row are
address range desired.
programmed.
read mode again.
Figure 4-2
Characteristics.
FLASH Memory
RCV
for an algorithm for programming a row (32 bytes) of
NVS
PGS
PROG
NVH
(typically 1 µs), the memory can be accessed in
(minimum of 10 µs).
(minimum of 5 µs).
(minimum of 5 µs).
(minimum of 30 µs).
PROG
PROG
MC68HC908MR8 — Rev 4.1
.
maximum. See
Freescale Semiconductor
21.7