Datasheet

38. Errata
38.1 Errata ATmega48PA
The revision letter in this section refers to the revision of the ATmega48PA device.
38.1.1 Rev. D
1 –
Analog MUX can be turned off when setting ACME bit
If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set
while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MUXes are turned off
until the ACME bit is cleared.
Fix/Workaround:
Clear the MUX3 bit before setting the ACME bit.
2 –
TWI Data setup time can be too short
When running the device as a TWI slave with a system clock above 2 MHz,
the data setup time for the first bit after ACK may in some cases be too
short. This may cause a false start or stop condition on the TWI line.
Fix/Workaround:
Insert a delay between setting TWDR and TWCR.
3 –
Increased AC offset on low input voltages
Analog comparator may have an offset greater than 40 mV on low input
voltages (Vin < 0.5V) when VCC > 3.6V.
Fix/Workaround:
Avoid using low input voltages to the analog comparator when VCC is
greater than 3.6V
38.1.2 Rev. B to C
Not sampled.
38.1.3 Rev. A
1 –
Power consumption in power save modes
Power consumption in power save modes will be higher due to improper
control of internal power management.
Fix/Workaround:
This problem will be corrected in Rev B.
2 –
Start-up time for the device
Due to implementation of a different NVM structure, the startup sequence for
the device will require longer start-up time.
Fix/Workaround:
There is no fix for this problem.
3 –
ATmega48PA/88PA/168PA
Errata
© 2018 Microchip Technology Inc.
Datasheet Complete
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