attiny2313v ATMEL Corporation, attiny2313v Datasheet - Page 14

• Manufacturer Part Number: attiny2313v
• Description: Attiny2313 8-bit With 2k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

Errata
ATtiny2313 Rev B
ATtiny2313 Rev A
14
ATtiny2313/V
The revision in this section refers to the revision of the ATtiny2313 device.
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1. Wrong values read after Erase Only operation
2. Parallel Programming does not work
3. Watchdog Timer Interrupt disabled
4. EEPROM can not be written below 1.9 volts
Revision A has not been sampled.
Wrong values read after Erase Only operation
Parallel Programming does not work
Watchdog Timer Interrupt disabled
EEPROM can not be written below 1.9 volts
At supply voltages below 2.7 V, an EEPROM location that is erased by the Erase
Only operation may read as programmed (0x00).
Problem Fix/Workaround
If it is necessary to read an EEPROM location after Erase Only, use an Atomic Write
operation with 0xFF as data in order to erase a location. In any case, the Write Only
operation can be used as intended. Thus no special considerations are needed as
long as the erased location is not read before it is programmed.
Parallel Programming is not functioning correctly. Because of this, reprogramming
of the device is impossible if one of the following modes are selected:
–
–
Problem Fix/Workaround
Serial Programming is still working correctly. By avoiding the two modes above, the
device can be reprogrammed serially.
If the watchdog timer interrupt flag is not cleared before a new timeout occurs, the
watchdog will be disabled, and the interrupt flag will automatically be cleared. This is
only applicable in interrupt only mode. If the Watchdog is configured to reset the
device in the watchdog time-out following an interrupt, the device works correctly.
Problem fix / Workaround
Make sure there is enough time to always service the first timeout event before a
new watchdog timeout occurs. This is done by selecting a long enough time-out
period.
Writing the EEPROM at V
Problem fix / Workaround
Do not write the EEPROM when V
In-System Programming disabled (SPIEN unprogrammed)
Reset Disabled (RSTDISBL programmed)
CC
below 1.9 volts might fail.
CC
is below 1.9 volts.
2543IS–AVR–04/06