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14.1.2
Block Diagram
Figure 14.1 shows a block diagram of the A/D converter.
AV
CC
V
REF
AV
SS
AN
0
AN
1
AN
2
Analog
AN
3
multi-
AN
plexer
4
AN
5
AN
6
AN
7
ADTRG
Compare match A0
ADTE
8-bit timer
8TCSR0
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
444
10-bit D/A
Comparator
Sample-and-
hold circuit
Figure 14.1 A/D Converter Block Diagram
Module data bus
+
–
Control circuit
Internal
data bus
ø/4
ø/8
ADI
interrupt signal
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