mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 425

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

21.9 Erasing the Flash EEPROM
21.10 Stop or Wait Mode
MC68HC912DG128 — Rev 3.0
MOTOROLA
CAUTION:
The following sequence demonstrates the recommended procedure for
erasing any of the Flash EEPROM array.
When stop or wait commands are executed, the MCU puts the Flash
EEPROM in stop or wait mode. In these modes the Flash module will
cease erasure or programming immediately.
It is advised not to enter stop or wait modes when program or erase
operation of the Flash array is in progress.
1. Set the ERAS bit.
2. Write to any valid address in the Flash array. The data written and
3. Wait for a time, t
4. Set the HVEN bit.
5. Wait for a time, t
6. Clear the ERAS bit.
7. Wait for a time, t
8. Clear the HVEN bit.
9. After time, t
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For More Information On This Product,
the address written are not important. The boot block will be
erased only if the control bit BOOTP is negated.
mode again.
Appendix: MC68HC912DG128A Flash
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RCV
(min 1 s), the memory can be accessed in read
NVS
ERAS
NVHL
(min. 10 s).
(min. 100 s).
(min. 8ms).
Appendix: MC68HC912DG128A Flash
Erasing the Flash EEPROM
Technical Data
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