W78C32B-40
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
• Three 16-bit timer/counters
• One full duplex serial port
• Boolean processor
• Six-source, two-level interrupt capability
• Built-in power management
• Packages:
− DIP 40:W78C32B-16/24/40
− PLCC 44: W78C32BP-16/24/40
− QFP 44: W78C32BF-16/24/40
− TQFP 44: W78C32BM-16/24/40
GENERAL DESCRIPTION
The W78C32B microcontroller supplies a wider frequency range than most 8-bit microcontrollers onthe market. It is compatible with the industry standard 80C32 microcontroller series.
The W78C32B contains four 8-bit bidirectional parallel ports, three 16-bit timer/counters, and a serialport. These peripherals are supported by a six-source, two-level interrupt capability. There are 256bytes of RAM, and the device supports ROMless operation for application programs.
The W78C32B 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 forcontinued peripheral operation. The power-down mode stops the crystal oscillator for minimum powerconsumption. The external clock can be stopped at any time and in any state without affecting theprocessor.
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