W78C516

PRELIMINARY W78C516 8-BIT MICROCONTROLLER GENERAL DESCRIPTION The W78C516 is a derivative of the W78C52 microcontroller family that provides extended internal ROM. The chip has 64K bytes of mask ROM and 256 bytes of RAM. This device provides an enhanced architecture that makes it more powerful and suitable for a variety of applications for general control systems. It provides on-chip 64KB mask ROM to accommodate large program codes, 256-bytes of non-volatile on-chip RAM, four 8-bit I/O ports, one 4-bit I/O port, three 16-bit timer/counters, eight sources with two-level interrupt structures, and on-chip oscillator clock circuits. FEATURES DC to 40 MHz extensive operating frequency 256-byte on-chip scratch pad RAM 64K-byte on-chip mask ROM 64K-byte address space for external Program Memory 64K-byte address space for external Data Memory Three 16-bit timer/counters Four 8-bit bit-addressable I/O ports One extra 4-bit bit-addressable I/O port (available on 44-pin PLCC/QFP package) Six-source, two priority-level interrupts Built-in programmable power-saving modes - Idle mode & Power-down mode Packages: − DIP 40: W78C516-24/40 − PLCC 44: W78C516P-24/40 − QFP 44: W78C516F-24/40 -1- Publication Release Date: April, 1999 Revision A0 ...