Overview: NEC m1eroputers,me. µPD546 µ-43 SINGLE CHIP MICROPUTER
USERS' MANUAL Five Militia Drive/Lexington, Massachusetts 02173 Telephone (617) 862·6410 Telex 92·3434 TWX 710·326·6520 u - 43 SINGLE CHIP MICROPUTER USE RS ' MANUAL
JANUARY 1978 NEC MICROPUTERS, INC . u-4 3 NEC MOS DIGITAL INTEGRATED CIRCUIT
4-BIT SINGLE CHIP MICROPUTER INTRODUCTION The NEC u - 43 is a 4- bit parallel central processing unit
that forms a single chip microputer especially suited for a broad range of low cost and sophisticated controller applications.
The u-43 contains all the necessary system functional blocks for a single chip microputer, including a 4- bit parallel ALU, 2 , 000 by 8 - bit program ROM, 96 by 4-bit data RAM, 35 input/output channels, a programmable interval timer , interrupt handling circuits, a clock generator and control circuits.
The instruction set of the u -43 includes 80 powerful instructions.
