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AV
CC
AN0
AN1
AN2
AN3
Legend
ADCR
: A/D control register
ADCSR : A/D control/status register
ADDRA : A/D data register A
ADDRB : A/D data register B
ADDRC : A/D data register C
ADDRD : A/D data register D
Rev. 1.0, 03/01, page 194 of 280
10-bit D/A
+
Comparator
Sample-and-
hold circuit
Figure 14-1 Block Diagram of A/D Converter
Module data bus
A
A
A
A
A
A
D
D
D
D
D
D
D
D
D
D
C
C
R
R
R
R
S
R
A
B
C
D
R
Control circuit
Internal data bus
ø/4
ø/8
ADI
interrupt request
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