GENERAL DESCRIPTION
The W78C33B microcontroller supplies a wider frequency range than most 8-bit microcontrollers on the market. It is functional compatible with the industry standard 80C32 microcontroller series except the one extra 4-bit bit-addressable I/O port (Port 4).

FEATURES
• 8-bit CMOS microcontroller
• Fully static design
• Low standby current at full supply voltage
• DC-40 MHz operation
• 256 bytes of on-chip scratchpad RAM
• ROMless operation
• 64K bytes program memory address space
• 64K bytes data memory address space
• Four 8-bit bidirectional ports
• One extra 4-bit bidirectional port
• Three 16-bit timer/counters
• One full duplex serial port
• Boolean processor
• Six-source, two-level interrupt capability
• Built-in power management
• Packages:
    - PLCC 44: W78C33BP-24/40
    - QFP 44: W78C33BF-24/40
    - TQFP 44: W78C33BM-24/40