ATTINY1634-MFR View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATTINY1634-MFR

8-bit Atmel tinyAVR Microcontroller with 16K Bytes In-System Programmable Flash

Atmel Corporation 

9. Errata

The revision letters in this section refer to the revision of the corresponding ATtiny1634 device.

9.1 ATtiny1634

9.1.1 Rev. C

• Port Pin Should Not Be Used As Input When ULP Oscillator Is Disabled

1. Port Pin Should Not Be Used As Input When ULP Oscillator Is Disabled

Port pin PB3 is not guaranteed to perform as a reliable input when the Ultra Low Power (ULP) oscillator is not

running. In addition, the pin is pulled down internally when ULP oscillator is disabled.

Problem Fix / Workaround

The ULP oscillator is automatically activated when required. To use PB3 as an input, activate the watchdog

timer. The watchdog timer automatically enables the ULP oscillator.

9.1.2 Rev. B

• Port Pin Should Not Be Used As Input When ULP Oscillator Is Disabled

1. Port Pin Should Not Be Used As Input When ULP Oscillator Is Disabled

Port pin PB3 is not guaranteed to perform as a reliable input when the Ultra Low Power (ULP) oscillator is not

running. In addition, the pin is pulled down internally when ULP oscillator is disabled.

Problem Fix / Workaround

The ULP oscillator is automatically activated when required. To use PB3 as an input, activate the watchdog

timer. The watchdog timer automatically enables the ULP oscillator.

9.1.3

Rev. A

• Flash / EEPROM Can Not Be Written When Supply Voltage Is Below 2.4V

• Port Pin Should Not Be Used As Input When ULP Oscillator Is Disabled

1. Flash / EEPROM Can Not Be Written When Supply Voltage Is Below 2.4V

When supply voltage is below 2.4V write operations to Flash and EEPROM may fail.

Problem Fix / Workaround

Do not write to Flash or EEPROM when supply voltage is below 2.4V.

2. Port Pin Should Not Be Used As Input When ULP Oscillator Is Disabled

Port pin PB3 is not guaranteed to perform as a reliable input when the Ultra Low Power (ULP) oscillator is not

running. In addition, the pin is pulled down internally when ULP oscillator is disabled.

Problem Fix / Workaround

The ULP oscillator is automatically activated when required. To use PB3 as an input, activate the watchdog

timer. The watchdog timer automatically enables the ULP oscillator.

ATtiny1634 [DATASHEET] 14

Atmel-8303HS-AVR-ATtiny1634-Summary_02/2014

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