2.4.1 Analog MUX Can Be Turned Off When Setting the 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 MUXs are turned
off until the ACME bit is cleared.
Work around
Clear the MUX3 bit before setting the ACME bit.
Affected Silicon Revisions
| ATmega48A/PA | ||
|---|---|---|
| Rev. D | Rev. E | |
| X | X | |
| ATmega88A/PA | ||
| Rev. F | Rev. G | |
| X | X | |
| ATmega168A/PA | ||
| Rev. E | Rev. L | |
| X | X | |
| ATmega328/P | ||
| Rev. A | Rev. B | Rev. D |
| X | X | X |