GENERAL DESCRIPTION The W78C52D microcontroller supplies a wider frequency and supply voltage range than most 8-bit microcontrollers on the market. It is compatible with the industry standard 80C52 microcontroller series. FEATURES • Fully static design • Supply voltage of 4.5V to 5.5V • DC-40 MHz operation • 256 bytes of on-chip scratchpad RAM • 8K bytes of on-chip mask ROM • 64K bytes program memory address space • 64K bytes data memory address space • Four 8-bit bidirectional ports • Three 16-bit timer/counters • One full duplex serial port • Eight-source, two-level interrupt capability • One extra 4-bit bit-addressable I/O port • Two additional external interrupts INT2 / INT3 • Watchdog timer • EMI reduction mode • Built-in power management • Code protection • Packages: - DIP 40: W78C52D-24/40 - PLCC 44: W78C52DP-24/40 - QFP 44: W78C52DF-24/40
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