Datasheet

Section 16 A/D Converter (8 Analog Input Channel Version)
Rev.6.00 Sep. 27, 2007 Page 702 of 1268
REJ09B0220-0600
16.1.2 Block Diagram
Figure 16.1 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
A
V CC
V ref
A
V SS
A
N0
A
N1
A
N2
A
N3
A
N4
A
N5
A
N6
A
N7
ADTRG
Conversion start
trigger from 8-bit
timer or TPU
Successive approximations
register
Multiplexer
Legend:
ADCR:
ADCSR:
ADDRA:
ADDRB:
ADDRC:
ADDRD:
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 16.1 Block Diagram of A/D Converter