mc68hc908mr32 Freescale Semiconductor, Inc, mc68hc908mr32 Datasheet - Page 40

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

Memory
2.8.3 FLASH Mass Erase Operation
Use this step-by-step procedure to erase the entire FLASH memory.
1. When in monitor mode, with security sequence failed (see
40
10. After time, t
of any FLASH address.
1. Set both the ERASE bit and the MASS bit in the FLASH control register.
2. Read the FLASH block protect register.
3. Write any data to any FLASH address
4. Wait for a time, t
5. Set the HVEN bit.
6. Wait for a time, t
7. Clear the ERASE and MASS bits.
8. Wait for a time, t
9. Clear the HVEN bit.
Mass erase is disabled whenever any block is protected (FLBPR does not
equal $FF).
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.
RCV
(typical 1 µs), the memory can be accessed in read mode again.
NVS
MErase
NVHL
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
(minimum 10 µs).
(minimum 100 µs).
(minimum 4 ms).
(1)
within the FLASH memory address range.
NOTE
NOTE
18.3.2
Security), write to the FLASH block protect register instead
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