282
12.1.2
Block Diagram
Figure 12.1 shows a block diagram of the A/D converter.
Internal data bus
AMR
ADSR
ADRR
Control logic
+
–
Com-
parator
AN
4
AN
5
AN
6
AN
7
ADTRG
AV
CC
AV
SS
Multiplexer
Reference
voltage
IRRAD
AV
CC
AV
SS
Legend:
AMR:
ADSR:
ADRR:
IRRAD:
A/D mode register
A/D start register
A/D result register
A/D converter interrupt request flag
Figure 12.1 Block Diagram of the A/D Converter