Datasheet

318
ATmega16U4/32U4 [DATASHEET]
Atmel-7766J-USB-ATmega16U4/32U4-Datasheet_04/2016
24.9.5 Digital Input Disable Register 0 – DIDR0
• Bit 7:4, 1:0 – ADC7D..4D - ADC1D..0D: ADC7:4 - ADC1:0 Digital Input Disable
When this bit is written logic one, the digital input buffer on the corresponding ADC pin is disabled. The
corresponding PIN Register bit will always read as zero when this bit is set. When an analog signal is applied to
the ADC7..4 / ADC1..0 pin and the digital input from this pin is not needed, this bit should be written logic one to
reduce power consumption in the digital input buffer.
24.9.6 Digital Input Disable Register 2 – DIDR2
• Bit 5:0 – ADC13D..ADC8D: ADC13:8 Digital Input Disable
When this bit is written logic one, the digital input buffer on the corresponding ADC pin is disabled. The
corresponding PIN Register bit will always read as zero when this bit is set. When an analog signal is applied to
the ADC13..8 pin and the digital input from this pin is not needed, this bit should be written logic one to reduce
power consumption in the digital input buffer.
Table 24-6. ADC Auto Trigger Source Selections
ADTS3 ADTS2 ADTS1 ADTS0 Trigger Source
0 0 0 0 Free Running mode
0 0 0 1 Analog Comparator
0 0 1 0 External Interrupt Request 0
0 0 1 1 Timer/Counter0 Compare Match A
0 1 0 0 Timer/Counter0 Overflow
0 1 0 1 Timer/Counter1 Compare Match B
0 1 1 0 Timer/Counter1 Overflow
0 1 1 1 Timer/Counter1 Capture Event
1 0 0 0 Timer/Counter4 Overflow
1 0 0 1 Timer/Counter4 Compare Match A
1 0 1 0 Timer/Counter4 Compare Match B
1 0 1 1 Timer/Counter4 Compare Match D
Bit 76543210
ADC7D ADC6D ADC5D ADC4D - - ADC1D ADC0D DIDR0
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
Initial Value00000000
Bit 76543210
- - ADC13D ADC12D ADC11D ADC10D ADC9D ADC8D DIDR2
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
Initial Value00000000