ATTINY25 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATTINY25

Atmel 8-bit AVR Microcontroller with 2/4/8K Bytes In-System Programmable Flash

Atmel Corporation 

– When using external clock, avoid setting the clock pin as Output.

– Do not read the EEPROM if power down power consumption is important.

– Use VCC lower than 4.5 Volts.

2. DebugWIRE looses communication when single stepping into interrupts

When receiving an interrupt during single stepping, debugwire will loose

communication.

Problem fix / Workaround

– When singlestepping, disable interrupts.

– When debugging interrupts, use breakpoints within the interrupt routine, and run into the interrupt.

3. PLL not locking

When at frequencies below 6.0 MHz, the PLL will not lock

Problem fix / Workaround

When using the PLL, run at 6.0 MHz or higher.

4. EEPROM read from application code does not work in Lock Bit Mode 3

When the Memory Lock Bits LB2 and LB1 are programmed to mode 3, EEPROM read does not work from the

application code.

Problem Fix/Work around

Do not set Lock Bit Protection Mode 3 when the application code needs to read from EEPROM.

5. 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 fre-

quency 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 frequency should be more than 1MHz.

This feature is known to be temperature dependent but it has not been characterized. Guidelines are given for

room temperature, only.

ATtiny25/45/85 [DATASHEET] 21

2586PS–AVR–06/2013

Share Link: