Datasheet

Section 16 A/D Converter
Rev. 3.00 Sep. 14, 2006 Page 274 of 408
REJ09B0105-0300
Module data bus
Control circuit
Internal data bus
10-bit D/A
Comparator
+
Sample-and-
hold circuit
ADI
interrupt request
Bus interface
Successive approximations
register
Analog multiplexer
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
AN0
AN1
AN2
AN3
[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
ADTRG
φ/4
φ/8
AV
CC
Figure 16.1 Block Diagram of A/D Converter