2.2.1 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
| ATmega48PA | |
|---|---|
| Rev. D | |
| X | |
| ATmega88PA | |
| Rev. F | |
| X | |
| ATmega168PA | |
| Rev. E | Rev. J |
| X | X |