UPD75518 NEC, UPD75518 Datasheet - Page 117
UPD75518
Manufacturer Part Number
UPD75518
Description
4 BIT SINGLE-CHIP MICROCOMPUTER
Manufacturer
NEC
Datasheet
1.UPD75518.pdf
(180 pages)
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4.10 A/D CONVERTER
to AN7).
(1) Configuration of the A/D converter
AV
The PD75518(A) contains an 8-bit analog/digital (A/D) converter that has eight analog input channels (AN0
The A/D converter employs the successive-approximation method.
AV
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
Fig. 4-57 shows the configuration of the A/D converter.
REF
SS
plexer
Multi-
0
R/2
Sample and hold circuit
ADM6
Fig. 4-57 Block Diagram of the A/D Converter
R
ADM5
Tap decoder
R
ADM4
8
SOC
Control circuit
Internal bus
+
–
EOC
R
Comparator
ADM1
R/2
0
ADM
SA register (8)
8
8
PD75518(A)
117
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