Datasheet

Section 16 A/D Converter
Rev. 6.00 Mar. 24, 2006 Page 276 of 412
REJ09B0142-0600
Module data bus
Control circuit
Internal data bus
10-bit D/A
Comparator
+
Sample-and-
hold circuit
ADI
interrupt
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
AN4
AN5
AN6
AN7
[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
Note: AN4, AN5, AN6, and AN7 do not exist in the 42-pin version.
ADTRG
φ/4
φ/8
AV
CC
*
Figure 16.1 Block Diagram of A/D Converter