Datasheet

Section 16 A/D Converter
Rev.6.00 Mar. 18, 2009 Page 662 of 980
REJ09B0050-0600
Module data bus
Control circuit
Internal data bus
10-bit D/A
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
G
A
D
D
R
F
A
D
D
R
E
A
D
D
R
H
A
D
D
R
B
A
D
D
R
A
AVCC
Vref
AVSS
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AN12
AN13
ADTRG
Conversion start
trigger from 8-bit
timer or TPU
Successive approximations
register
Multiplexer
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
ADDRE: A/D data register E
ADDRF: A/D data register F
ADDRG: A/D data register G
ADDRH: A/D data register H
Figure 16.1 Block Diagram of A/D Converter