Atmel ATmega48A

556
8271D–AVR–05/11
ATmega48A/PA/88A/PA/168A/PA/328/P
35.8 Errata ATmega328P
The revision letter in this section refers to the revision of the ATmega328P device.
35.8.1 Rev D
•
Analog MUX can be turned off when setting ACME bit
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 MUX'es are turned off until the ACME bit is cleared.
Problem Fix/Workaround
Clear the MUX3 bit before setting the ACME bit.
35.8.2 Rev C
Not sampled.
35.8.3 Rev B
•
Analog MUX can be turned off when setting ACME bit
• Unstable 32kHz Oscillator
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 MUX'es are turned off until the ACME bit is cleared.
Problem Fix/Workaround
Clear the MUX3 bit before setting the ACME bit.
2. Unstable 32kHz Oscillator
The 32kHz oscillator does not work as system clock. The 32kHz oscillator used as asyn-
chronous timer is inaccurate.
Problem Fix/ Workaround
None.
35.8.4 Rev A
•
Unstable 32kHz Oscillator
1. Unstable 32kHz Oscillator
The 32kHz oscillator does not work as system clock. The 32kHz oscillator used as asyn-
chronous timer is inaccurate.
Problem Fix/ Workaround
None.