GENERAL DESCRIPTION

The W78L52 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. The W78L52 contains four 8-bit bidirectional parallel ports, one extra 4-bit bit-addressable I/O port (Port 4) and two additional external interrupts (INT2 , INT3 ), three 16-bit timer/counters, one watchdog timer and a serial port. These peripherals are supported by a eight-source, two-level interrupt capability. There are 256 bytes of RAM and an 8K byte mask ROM for application programs.

FEATURES

• Fully static design

• Supply voltage of 1.8V to 5.5V

• DC-24 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: W78L52-24

- PLCC 44: W78L52P-24

- QFP 44: W78L52F-24