UCOM-45

NEe Microcomputers, Inc. NEe J£COM-45 4-81T SINGLE CHIP MICROCOMPUTERS DESC RIPTI ON The IlCOM-45 4-bit single chip microcomputers described below comprise the lower-performance portion of the IlCOM-4 Microcomputer Family. They are dis· tinguished from other IlCOM-4 products by their smaller ROM and RAM, and their reduced 21 line I/O capability. FEATURES 1000 x 8 ROM (IlPD550 and IlPD550L have 640 x 8 ROM) 32 x 4 RAM lOlls Instruction Cycle Time, Typical 58 Powerful Instructions - Table Look·Up Capability with CZP and JPA Instructions - Single Bit Manipulation of RAM or I/O Ports l-Level Subroutine Stack Extensive I/O Calla~iI ity - One 4-Bit Input Ports - Two 4-Bit I/O Ports - Two 4-Bit Output Ports - One l-Bit Output Port Software Testable Interrupt Built·ln Clock Signal Generation Circuitry Built·ln RESET Circuitry Single Power Supply Low Power Consumption PMOS or CMOS Technologies 28-Pin Plastic DIP Choice of 5 Diff...