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Scanning the analog comparator, Atmega162/v – Rainbow Electronics ATmega162V User Manual

Page 211

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211

ATmega162/V

2513E–AVR–09/03

Scanning the Analog
Comparator

The relevant Comparator signals regarding Boundary-scan are shown in Figure 91. The
Boundary-scan cell from Figure 92 is attached to each of these signals. The signals are
described in Table 87.

The Comparator need not be used for pure connectivity testing, since all analog inputs
are shared with a digital port pin as well.

Figure 91. Analog Comparator

Figure 92. General Boundary-scan Cell used for Signals for Comparator

ACBG

BANDGAP

REFERENCE

AC_IDLE

ACO

0

1

D

Q

D

Q

G

0

1

From

Previous

Cell

ClockDR

UpdateDR

ShiftDR

To

Next

Cell

EXTEST

To Snalog Circuitry/

To Digital Logic

From Digital Logic/

From Analog Ciruitry