ATmega88PA Automotive Atmel Corporation, ATmega88PA Automotive Datasheet - Page 264
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ATmega88PA Automotive
Manufacturer Part Number
ATmega88PA Automotive
Description
Manufacturer
Atmel Corporation
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Atmel ATmega48PA/88PA/168PA [Preliminary]
• Bit 5 – ADATE: ADC Auto Trigger Enable
When this bit is written to one, Auto Triggering of the ADC is enabled. The ADC will start a
conversion on a positive edge of the selected trigger signal. The trigger source is selected by
setting the ADC Trigger Select bits, ADTS in ADCSRB.
• Bit 4 – ADIF: ADC Interrupt Flag
This bit is set when an ADC conversion completes and the Data Registers are updated. The
ADC Conversion Complete Interrupt is executed if the ADIE bit and the I-bit in SREG are set.
ADIF is cleared by hardware when executing the corresponding interrupt handling vector.
Alternatively, ADIF is cleared by writing a logical one to the flag. Beware that if doing a
Read-Modify-Write on ADCSRA, a pending interrupt can be disabled. This also applies if the
SBI and CBI instructions are used.
• Bit 3 – ADIE: ADC Interrupt Enable
When this bit is written to one and the I-bit in SREG is set, the ADC Conversion Complete
Interrupt is activated.
• Bits 2:0 – ADPS[2:0]: ADC Prescaler Select Bits
These bits determine the division factor between the system clock frequency and the input
clock to the ADC.
Table 24-5.
ADPS2
0
0
0
0
1
1
1
1
ADC Prescaler Selections
ADPS1
0
0
1
1
0
0
1
1
ADPS0
0
1
0
1
0
1
0
1
Division Factor
128
16
32
64
2
2
4
8
9223B–AVR–09/11
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