AN2156 Freescale Semiconductor / Motorola, AN2156 Datasheet - Page 44

• Manufacturer Part Number: AN2156
• Description: Programming and Erasing FLASH and EEPROM Memories on the MC68HC908AS60A/AZ60A
• Manufacturer: Freescale Semiconductor / Motorola

Application Note
Question 16
Answer 16
Question 17
Answer 17
Question 18
Answer 18
Question 19
Answer 19
44
NOTE:
In monitor mode, how can I tell if the break security has been
successful?
If the security check was unsuccessful, memory reads will return the
same data for every byte read instead of the code or data expected.
Do I need to confirm the memory contents after programming the
FLASH?
It is recommended that the code used to program the FLASH also
include a verification step to ensure the integrity of the data programmed
into the FLASH.
A block of memory in the FLASH array is protected by programming the
block protect register. When I execute a mass erase operation without
applying high voltage on the IRQ pin, can an unprotected block be
erased?
No. When a FLASH array is partially protected, the mass erase cannot
be performed unless high voltage is placed on IRQ.
When a high voltage is placed on the IRQ pin, the block protection
register is ignored and the entire memory array will be erased if a mass
erase operation is executed.
What is the expected lifetime of FLASH memory?
The minimum program/erase endurance and data retention lifetime of
the FLASH memory for all conditions is found in the MC68HC908AZ60A
and MC68HC908AS60A Technical Data book, Motorola document order
number MC68HC908AZ60A/D.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
AN2156