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