Datasheet

Section 14 A/D Converter
Rev.4.00 Nov. 02, 2005 Page 204 of 304
REJ09B0143-0400
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 14.1 Block Diagram of A/D Converter