Atmel ATmega48A Manual page 553

35. Errata
35.1 Errata ATmega48A
35.1.1 Rev. D
35.2 Errata ATmega48PA
35.2.1 Rev. D
35.3 Errata ATmega88A
35.3.1 Rev. F
8271D–AVR–05/11
ATmega48A/PA/88A/PA/168A/PA/328/P
The revision letter in this section refers to the revision of the ATmega48A device.
•
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.
The revision letter in this section refers to the revision of the ATmega48PA device.
•
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.
The revision letter in this section refers to the revision of the ATmega88A device.
•
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.
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