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GENERAL DESCRIPTION

The W78C32C microcontroller supplies a wider frequency range than most 8-bit microcontrollers on the market. It is compatible with the industry standard 80C32 microcontroller series.

The W78C32C contains four 8-bit bidirectional parallel ports, three 16-bit timer/counters, and a serial port. These peripherals are supported by a six-source, two-level interrupt capability. There are 256 bytes of RAM, and the device supports ROMless operation for application programs.

The W78C32C microcontroller has two power reduction modes, idle mode and power-down mode, both of which are software selectable. The idle mode turns off the processor clock but allows for continued peripheral operation. The power-down mode stops the crystal oscillator for minimum power consumption. The external clock can be stopped at any time and in any state without affecting the 1.processor.

FEATURES

¡ñ 8-bit CMOS microcontroller

¡ñ Fully static design

¡ñ Low standby current at full supply voltage

¡ñ DC-40 MHz operation

¡ñ 256 bytes of on-chip scratchpad RAM

¡ñ ROMless operation

¡ñ 64K bytes program memory address space

¡ñ 64K bytes data memory address space

¡ñ Four 8-bit bidirectional ports

¡ñ Three 16-bit timer/counters

¡ñ One full duplex serial port

¡ñ Boolean processor

¡ñ Six-source, two-level interrupt capability

¡ñ Built-in power management

¡ñ Packages:

- DIP 40: W78C32C-24/40

- PLCC 44: W78C32CP-24/40

- QFP 44: W78C32CF-24/40