UPD75212A

DATA SHEET MOS INTEGRATED CIRCUIT µPD75212A 4-BIT SINGLE-CHIP MICROCOMPUTER DESCRIPTION The µPD75212A is a microcomputer with a CPU capable of 1-, 4-, and 8-bit data processing, ROM, RAM, I/O ports, a fluorescent display tube controller/driver, a watch timer, a timer/pulse generator capable of outputting 14-bit PWM, a serial interface and a vectored interrupt function integrated on a single-chip. The µPD75212A is a version of the µ PD75216A with a small ROM capacity (12K). The µPD75212A uses the VCR, ECR and CD fluorescent display tubes as display devices and is most suitable for applications requiring the timer/watch function and high-speed interrupt servicing. It can help to provide the unit with many functions and to decrease performance costs. Functions are described in detail in the following User’s Manual. Be sure to read when carrying out design work. µPD75216A User’s Manual: IEM-988 FEATURES Architecture equal to that of an 8-bit microcomputer High-speed operation : Minimum instruction execution time : 0.95 µs (when operated at 4.19 MHz) Instruction execution time variable function realizing a wide range of operating voltages On-chip large-capacity program memory : 12K bytes Watch operation with an ultra low current consumption : 5 µA TYP. (at the 3 V operation) On-chip programmable fluorescent display tube controller/driver Timer function : 4 ch 14-bit PWM output capability with the voltage synthesizer type electronic tuner Buzzer output capabi...