ATMEGA128RFA1_11 ATMEL [ATMEL Corporation], ATMEGA128RFA1_11 Datasheet - Page 431

• Manufacturer Part Number: ATMEGA128RFA1_11
• Description: 8-bit Microcontroller with Low Power 2.4GHz Transceiver for ZigBee and IEEE 802.15.4
• Manufacturer: ATMEL [ATMEL Corporation]

8266C-MCU Wireless-08/11
• Bits 2:0 – ADTS2:0: ADC Auto Trigger Source
If ADATE in ADCSRA is written to one, the value of these bits selects which source will
trigger an A/D conversion. If ADATE is cleared, the ADTS2:0 settings will have no
effect. A conversion will be triggered by the rising edge of the selected Interrupt Flag.
Note that switching from a trigger source that is cleared, to a trigger source that is set,
will generate a positive edge on the trigger signal. If ADEN in ADCSRA is set, this will
start a conversion. Switching to Free Running mode (ADTS2:0=0) will not cause a
trigger event, even if the ADC Interrupt Flag is set.
Table 27-12. ADC Auto Trigger Source Selections
101100
101101
101110
101111
110000
110001
110010
110011
110100
110101
110110
110111
111000
111001
111010
111011
111100
111101
111110
111111
MUX5:0
ADTS2
0
0
0
0
1
1
1
1
Reserved
Reserved
Single Ended
ADTS1
Input
0
0
1
1
0
0
1
1
N/A
N/A
ADTS0
Positive Differential
0
1
0
1
0
1
0
1
Input
SRAM Back-bias Voltage V
SRAM Back-bias Voltage V
Trigger Source
Free Running mode
Analog Comparator
External Interrupt Request 0
Timer/Counter0 Compare Match A
Timer/Counter0 Overflow
Timer/Counter1 Compare Match B
Timer/Counter1 Overflow
Timer/Counter1 Capture Event
ATmega128RFA1
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Negative Differential
N/A
Input
DRTBBN
DRTBBP
Gain
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