UPD75064A データシートの表示（PDF） - NEC => Renesas Technology

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UPD75064A

4-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75064, 75066, 75068, 75064(A), 75066(A), 75068(A)

5.8 A/D Converter

The µPD75068 contains an 8-bit analog/digital (A / D) converter that has eight analog input channels

(AN0 - AN7).

The A /D converter employs the successive-approximation method.

Figure 5-7. Block Diagram of A/D Converter

Internal bus

8

0 ADM6 ADM5 ADM4 SOC EOC ADM1 0 ADM

8

AN0/P110

AN1/P111

AN2/P112

AN3/P113

AN4/KR0/P60

AN5/KR1/P61

AN6/KR2/P62

AN7/KR3/P63

Sample and hold circuit

Multi-

plexer

Control circuit

+

–

Comparator

Tap decoder

SA register (8)

8

AVREF

AVSS

R/2

R

R

R R/2

Series resistor string

25

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