Datasheet

chain, so the boundary scan chain can not make a XTAL Oscillator requiring internal capacitors to
run unless the fuse is correctly programmed.
29.13.5. Scanning the Analog Comparator
The relevant Comparator signals regarding Boundary-scan are shown in the first figure below. The
Boundary-scan cell from the second figure below is attached to each of these signals. The signals are
described in Table 29-4 Boundary-scan Signals for the Analog Comparator on page 350.
The Comparator need not be used for pure connectivity testing, since all analog inputs are shared with a
digital port pin as well.
Figure 29-10 Analog comparator
ACBG
BANDGAP
REFERENCE
ADC MULTIPLEXER
OUTP UT
ACME
AC_IDLE
ACO
ADCEN
Figure 29-11 General Boundary-scan Cell used for Signals for Comparator and ADC
0
1
D Q D Q
G
0
1
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Atmel ATmega64A [DATASHEET]
Atmel-8160E-ATmega64A_Datasheet_Complete-09/2015
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