42
AT90S2313
0839G–08/01
1. Keep the AVR RESET active (low) during periods of insufficient power supply
voltage. This is best done by an external low V
CC
Reset Protection circuit, often
referred to as a Brown-out Detector (BOD). Please refer to the AVR 180 applica-
tion note for design considerations regarding power-on reset and low-voltage
detection.
2. Keep the AVR core in Power-down Sleep Mode during periods of low V
CC
. This
will prevent the CPU from attempting to decode and execute instructions, effec-
tively protecting the EEPROM registers from unintentional writes.
3. Store constants in Flash memory if the ability to change memory contents from
software is not required. Flash memory cannot be updated by the CPU and will
not be subject to corruption.
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