型号 封装 在线定购
W78E051DDG(查看) DIP40
W78E051DFG(查看) PQFP44
W78E051DPG(查看) PLCC44


技术资料—— W78E051D PDF技术资料

W78E051D 概述

The W78E051D is an 8-bit microcontroller which can accommodate a wider frequency range with low power consumption. The instruction set for the W78E051D is fully compatible with the standard 8052.

The W78E051D contains 4K bytes Flash EPROM programmable by hardware writer; a 256 bytes RAM; four 8-bit bi-directional (P0, P1, P2, P3) and bit-addressable I/O ports; an additional 4-bit I/O port P4; three 16-bit timer/counters; a hardware watchdog timer and a serial port. These peripherals are supported by 8 sources 4-level interrupt capability. To facilitate programming and verification, the Flash EPROM inside the W78E051D allows the program memory to be programmed and read electronically. Once the code is confirmed, the user can protect the code for security.

The W78E051D 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. The W78E051D contains In-System Programmable (ISP) 2KB AP Flash EPROM for loader program; operating voltage from 2.4V to 5.5V.

W78E051D 参数
W78E051D 存储器
Flash(APROM)   4KB
Flash(LDROM)   2KB
RAM   256B
W78E051D 参数
I/O口   4个(8位)
16位定时器   3
全双工串口   1
中断源   8
W78E051D 封装与引脚

W78E051D 特性

    W78E051D 主要特性如下:
  • Fully static design 8-bit CMOS microcontroller
  • Pin and Instruction-set compatible with 80C52
  • 256 bytes of on-chip scratchpad RAM
  • 4K bytes electrically erasable/programmable Flash EPROM
  • 2K bytes LDROM support ISP function
  • 64KB program memory address space
  • 64KB data memory address space
  • 12 clocks per machine cycle operation (default), Speed up to 40 MHz
  • Four 8-bit bi-directional ports with high sink current for LED driver
  • 8-sources, 4-level interrupt capability
  • One extra 4-bit bit-addressable I/O port, additional / (available on PQFP, PLCC and LQFP package)
  • Three 16-bit timer/counters
  • One full duplex serial port
  • Watchdog Timer
  • Eight sources, two-level interrupt capability
  • EMI reduction mode
  • Software Reset
  • Built-in power management with idle mode and power down mode
  • Code protection