calculator chip
1.Calculator chip adopted as data path of single bus, and ALU of 4bit was the base of operation, inner RCOSC produced stable clock source, SRAM adopted as memory, and microcontroller adopted as ROM architecture.
3.This paper shortly introduces the function feature, pin meanings, operation principle and sequence of ICL7135 which is a high precision 41/2 digit A/D converter with BCD output. It gives application example on the interface circuit design of ICL7135 with single chip calculator and LED driver ICM7212.
