DATA SHEET MOS INTEGRATED CIRCUIT µPD17215, 172.
NEC
UPD17215 - 4-BIT SINGLE-CHIP MICROCONTROLLER
DATA SHEET MOS INTEGRATED CIRCUIT µPD17215, 17216, 17217, 17218 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL .