312
12.1.2
Block Diagram
Figure 12.1 shows a block diagram of the A/D converter.
Internal data bus
AMR
ADSR
ADRRH
ADRRL
Control logic
+
–
Com-
parator
AN
AN
AN
AN
AN
AN
AN
AN
ADTRG
AV
AV
CC
SS
Multiplexer
Reference
voltage
IRRAD
AV
CC
AV
SS
0
1
2
3
4
5
6
7
Notation:
AMR:
ADSR:
ADRR:
IRRAD:
A/D mode register
A/D start register
A/D result register
A/D conversion end interrupt request flag
Figure 12.1 Block Diagram of the A/D Converter