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ATTINY20-EK1

8-bit AVR Microcontroller with 2K Bytes In-System Programmable Flash

Atmel Corporation 

26. Errata

The revision letters in this section refer to the revision of the corresponding ATtiny20 device.

26.1 Rev. A

Issue:

Lock bits re-programming

Resolution:

Attempt to re-program Lock bits to present, or lower protection level (tampering attempt), causes

erroneously one, random line of Flash program memory to get erased. The Lock bits will not get

changed, as they should not.

Workaround: Do not attempt to re-program Lock bits to present, or lower protection level.

Issue:

MISO output driver is not disabled by Slave Select (SS) signal

Resolution:

When SPI is configured as a slave and the MISO pin is configured as an output the pin output

driver is constantly enabled, even when the SS pin is high. If other slave devices are connected to

the same MISO line this behavior may cause drive contention.

Workaround: Monitor SS pin by software and use the DDRB2 bit of DDRB to control the MISO pin driver.

ATtiny20 [DATASHEET]

Atmel-8235F-AVR-ATtiny20-Datasheet_09/2014

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