2.4.1 USART Start-Up Functionality Not Working

While in power save modes, the USART start bit detection logic fails to wake up the device.

Work around
None.

Affected Silicon Revisions

ATmega48PB/88PBATmega168PB
Rev. ARev. BRev. KRev. MRev. ARev. BRev. CRev. NRev. O
X---X----