Datasheet

Section 14 A/D Converter (8 Analog Input Channel Version)
Rev.7.00 Feb. 14, 2007 page 532 of 1108
REJ09B0089-0700
14.1.2 Block Diagram
Figure 14.1 shows a block diagram of the A/D converter.
Module data bus
Control circuit
Internal data bus
10-bit
D/A converter
Comparator
+
−
Sample-and-
hold circuit
ADI interrupt
signal
Bus interface
A
D
C
S
R
A
D
C
R
A
D
D
R
D
A
D
D
R
C
A
D
D
R
B
A
D
D
R
A
AV
CC
V ref
AV SS
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
ADTRG
Conversion start
trigger from 8-bit
timer or TPU
Successive approximations
register
Multiplexer
ADCR:
ADCSR:
ADDRA:
ADDRB:
ADDRC:
ADDRD:
Legend:
A/D control register
A/D control/status register
A/D data register A
A/D data register B
A/D data register C
A/D data register D
Figure 14.1 Block Diagram of A/D Converter