MC68HC908AZ60 Datasheet, PDF (46/480 Pages) Motorola, Inc – HCMOS Microcontroller Unit

FLASH-1 Memory
12. Read back data in margin read mode. This is done in eight
separate read operations which are each stretched by eight
cycles.
13. Clear the MARGIN bit.
NOTE:
While these operations must be performed in the order shown, other
unrelated operations may occur between the steps. It is highly
recommended that the interrupt mask is set during programming. Under
very controlled situations it may be possible to omit this step, but it
remains the user’s responsibility to ensure that any interrupts do not
interfere with the Flash being programmed properly.
This program/margin read sequence is repeated throughout the memory
until all data is programmed. The Smart Programming Algorithm is
always required when programming any part of the array. This algorithm
insures the minimum possible program time and avoids the deleterious
program disturb effect. (See FLASH Erase Operation on page 41).
NOTE:
In order to ensure proper FLASH read operation after completion of the
smart programming algorithm, a series of 500 dummy FLASH reads
must be performed of any address before accurate data is read from the
FLASH.
MC68HC908AZ60 — Rev 2.0
44
FLASH-1 Memory
10-flash-1
MOTOROLA