AN2156 Freescale Semiconductor / Motorola, AN2156 Datasheet - Page 45

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

Question 20
Answer 20
Question 21
Answer 21
Question 22
Answer 22
AN2156
MOTOROLA
What steps can I take to prolong the life of the FLASH memory?
The FLASH memory has a finite program/erase durability and a finite
data retention lifetime. However, the specification shows the minimum
lifetime considering the worst case set of conditions applied to the part.
In general, the FLASH will last longer if it is used at moderate
temperatures (0–70
minimum.
Can I program/erase the FLASH at the maximum temperature limits
continuously for the specified lifetime of the part?
Yes. Row program and erase cycle durability is specified to be 10-K
maximum for each. However, exceeding that value is not recommended.
The FLASH can be read continuously over the life of the device.
What modes of operation cause the most noise?
Program and erase modes cause a significant amount of EMI
(electromagnetic interference) and power supply noise due to the high
transient current demand of the charge pump. High accuracy ADC
(analog-to-digital) conversions may not be possible while the FLASH is
programming or erasing.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
o
C) and the program/erase cycles are kept to a
FLASH Frequently Asked Questions
Application Note
45