ATMEGA325-16AJ ATMEL [ATMEL Corporation], ATMEGA325-16AJ Datasheet - Page 224

• Manufacturer Part Number: ATMEGA325-16AJ
• Description: 8-bit Microcontroller with In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Scanning the Analog
Comparator
224
ATmega325/3250/645/6450
The relevant Comparator signals regarding Boundary-scan are shown in Figure 105.
The Boundary-scan cell from Figure 106 is attached to each of these signals. The sig-
nals are described in Table 94.
The Comparator need not be used for pure connectivity testing, since all analog inputs
are shared with a digital port pin as well.
Figure 105. Analog Comparator
Figure 106. General Boundary-scan cell Used for Signals for Comparator and ADC
From Analog Ciruitry
From Digital Logic/
ADCEN
ACME
ADC MULTIPLEXER
REFERENCE
OUTPUT
BANDGAP
Previous
From
Cell
ShiftDR
0
1
ACBG
ClockDR
D
UpdateDR
Q
Next
Cell
To
ACD
D
G
Q
AC_IDLE
EXTEST
0
1
To Analog Circuitry/
To Digital Logic
ACO
2570A–AVR–09/04