UPD75512 Datasheet, PDF (30/64 Pages) NEC – 4-BIT SINGLE-CHIP MICROCOMPUTER

µPD75512(A)
5.9 A/D CONVERTER
The µPD75512(A) is provided with an 8-bit resolution analog-to-digital (A/D) converter with eight channels
of analog inputs (AN0-AN7).
This A/D converter is of a successive approximation type.
Internal bus
8
0 ADM6 ADM5 ADM4 SOC EOC ADM1 0 ADM
8
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AVREF
AVSS
Sample hold circuit
Control circuit
+
–
Comparator
Tap decoder
R/2 R
R
R
R/2
SA register (8)
8
Fig. 5-10 Block Diagram of A/D Converter
30