器件名称: W78C33B-24
功能描述: 8-BIT MICROCONTROLLER
文件大小: 134.78KB 共15页
简 介:Preliminary W78C33B 8-BIT MICROCONTROLLER
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). The W78C33B 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 W78C33B 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 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: W78C3……
