Datasheet

Table 27-5. Boundary-scan Signals for the ADC
Signal Name Direction as
Seen from
the ADC
Description Recommended
Input when not in
Use
Output Values
when
Recommended
Inputs are Used,
and CPU is not
Using the ADC
COMP Output Comparator Output 0 0
ACLK Input Clock signal to gain stages
implemented as Switch-cap
filters
0 0
ACTEN Input Enable path from gain stages
to the comparator
0 0
ADCBGEN Input Enable Band-gap reference as
negative input to comparator
0 0
ADCEN Input Power-on signal to the ADC 0 0
AMPEN Input Power-on signal to the gain
stages
0 0
DAC_9 Input Bit 9 of digital value to DAC 1 1
DAC_8 Input Bit 8 of digital value to DAC 0 0
DAC_7 Input Bit 7 of digital value to DAC 0 0
DAC_6 Input Bit 6 of digital value to DAC 0 0
DAC_5 Input Bit 5 of digital value to DAC 0 0
DAC_4 Input Bit 4 of digital value to DAC 0 0
DAC_3 Input Bit 3 of digital value to DAC 0 0
DAC_2 Input Bit 2 of digital value to DAC 0 0
DAC_1 Input Bit 1 of digital value to DAC 0 0
DAC_0 Input Bit 0 of digital value to DAC 0 0
EXTCH Input Connect ADC channels 0 - 3 to
by-pass path around gain
stages
1 1
G10 Input Enable 10x gain 0 0
G20 Input Enable 20x gain 0 0
GNDEN Input Ground the negative input to
comparator when true
0 0
Atmel ATmega32A [DATASHEET]
Atmel-8155I-ATmega32A_Datasheet_Complete-08/2016
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