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Rev. 1.0, 07/01, page 254 of 372
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 :
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
ø/4
ø/8
AV
CC
Figure 16-1 Block Diagram of A/D Converter