Winbond Electronics Corporation W78C31B
The W78C31B microcontroller supplies a wider frequency range than most 8-bit microcontrollers on the market. It is compatible with the industry standard 80C31 microcontroller series. The W78C31B contains four 8-bit bidirectional parallel ports, two 16-bit timer/counters, and a serial port.GENERAL DESCRIPTION
These peripherals are supported by a five-source, two-level interrupt capability. There are 128 bytes of RAM, and the device supports ROMless operation for application programs. The W78C31B 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 processor.FEATURES
● 8-bit CMOS microcontroller● Fully static design
● Low standby current at full supply voltage
● DC-40 MHz operation
● 128 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
● Two 16-bit timer/counters
● One full duplex serial port
● Boolean processor
● Five-source, two-level interr...