Datasheet

217
2586N–AVR–04/11
ATtiny25/45/85
27. Errata
27.1 Errata ATtiny25
The revision letter in this section refers to the revision of the ATtiny25 device.
27.1.1 Rev D and E
No known errata.
27.1.2 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 1MHz and supply voltage is below
2V. If operating frequency can not be raised above 1MHz then supply voltage should be
more than 2V. Similarly, if supply voltage can not be raised above 2V then operating fre-
quency should be more than 1MHz.
This feature is known to be temperature dependent but it has not been characterised.
Guidelines are given for room temperature, only.
27.1.3 Rev A
Not sampled.
27.2 Errata ATtiny45
The revision letter in this section refers to the revision of the ATtiny45 device.
27.2.1 Rev F and G
No known errata
27.2.2 Rev D and E
•
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 1MHz and supply voltage is below
2V. If operating frequency can not be raised above 1MHz then supply voltage should be
more than 2V. Similarly, if supply voltage can not be raised above 2V then operating fre-
quency should be more than 1MHz.
This feature is known to be temperature dependent but it has not been characterised.
Guidelines are given for room temperature, only.