ATTINY25_08 Datasheet, PDF (18/28 Pages) ATMEL Corporation – 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash

8. Errata
8.1 Errata ATtiny25
The revision letter in this section refers to the revision of the ATtiny25 device.
8.1.1
Rev D and E
No known errata.
8.1.2
Rev B and C
• EEPROM read may fail at low supply voltage / low clock frequency
1. EEPROM read may fail at low supply voltage / low clock frequency
Trying to read EEPROM at low clock frequencies and/or low supply voltage may result in
invalid data.
Problem Fix/Workaround
Do not use the EEPROM when clock frequency is below 1 MHz and supply voltage is below
2V. If operating frequency can not be raised above 1 MHz then supply voltage should be
more than 3V. Similarly, if supply voltage can not be raised above 2V then operating fre-
quency should be more than 2 MHz.
This feature is known to be temperature dependent but it has not been characterised.
Guidelines are given for room temperature, only.
8.1.3 Rev A
Not sampled.
18 ATtiny25/45/85
2586KS–AVR–01/08