Datasheet

13. Errata
13.1 Errata ATmega48PB
The revision letter in this section refers to the revision of the ATmega48PB device.
13.1.1 Rev. A
– Wrong device ID when using debugWire
– Power consumption in power save modes
– USART start-up functionality not working
– External capacitor on AREF pin
– Increased power consumption when using voltage reference other than AVCC
1.) Wrong device ID when using debugWire
The device ID returned using debugWire is incorrect.
Problem Fix/Workaround
None.
2.) Power consumption in power save modes
Power consumption in power save modes will be higher due to improper control of internal power
management.
Problem Fix/Workaround
None.
3.) USART start-up functionality not working
While in power save modes, the USART start bit detection logic fails to wake up the device.
Problem Fix/Workaround
None.
4.) External capacitor on AREF pin
If an external capacitor is used on the analog reference pin (AREF), it should be equal to or larger than
100nF. Smaller capacitor value can make the AREF buffer unstable with large ringing which will reduce
the accuracy of the ADC.
Problem Fix/Workaround
None.
5. ) Increased power consumption when using voltage reference other than AVCC
Power consumption is higher when using internal or external voltage reference that is not equal to AVCC.
The increased current consumption will be the same for active and all sleep modes, but the largest
impact will be in low power sleep modes.
Problem Fix/Workaround
ATmega48PB/88PB/168PB
© 2017 Microchip Technology Inc.
Datasheet Summary
DS40001910A-page 22