mc68hc908mr24 Freescale Semiconductor, Inc, mc68hc908mr24 Datasheet - Page 63

• Manufacturer Part Number: mc68hc908mr24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MC68HC908MR24 — Rev. 4.1
Freescale Semiconductor
NOTE:
NOTE:
To program and margin read the FLASH memory, use this step-by-step
procedure:
While these operations must be performed in the order shown, other
unrelated operations may occur between the steps.
This program/margin read sequence is repeated throughout the memory
until all data is programmed. For minimum overall programming time and
least program disturb effect, the smart programming algorithm should be
followed. (See
Mask interrupts prior to setting HVEN.
10. Clear the PGM bit.
11. Wait for a time, t
12. Read back data in verify mode. This is done in eight separate read
13. Clear the MARGIN bit.
1. Set the PGM bit. This configures the memory for program
2. Read from the block protect register.
3. Write data to the eight bytes of the page being programmed. This
4. Set the HVEN bit.
5. Wait for a time, t
6. Clear the HVEN bit.
7. Wait for a time, t
8. Set the MARGIN bit.
9. Wait for a time, t
operation and enables the latching of address and data for
programming.
requires eight separate write operations.
operations which are each stretched by eight cycles. Once the
HVEN bit is set, the array cannot be read.
4.6 FLASH Erase
FLASH Memory
PROG
HVTV
VTP
HVD
.
.
.
.
Operation.)
Advance Information
FLASH Memory
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