448
14.1.2
Block Diagram
Figure 14.1 shows a block diagram of the A/D converter.
Module data bus
Bus interf
ace
Internal
data bus
ADDRA
ADDRB
ADDRC
ADDRD
ADCSR
ADCR
Successiv
e-
appro
ximations register
10-bit D/A
Analog
multi-
plexer
Sample-and-
hold circuit
Comparator
+
–
Control circuit
ø/4
ø/8
ADI
interrupt signal
AV
V
AV
CC
REF
SS
AN
AN
AN
AN
AN
AN
AN
AN
0
1
2
3
4
5
6
7
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
ADTRG
ADTE
Compare match A0
8TCSR0
8-bit timer
Figure 14.1 A/D Converter Block Diagram
Содержание H8/3060
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