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由8051组成的单片机系统通常情况下,P0口分时复用作为地址、数据总线,P2口提供A15...
由8051组成的单片机系统通常情况下,P0口分时复用作为地址、数据总线,P2口提供A15-A8即高8位地址,P3口用作第二功能,只有P1口通常用作I/0口。P1口是8位准双向口,它的每一位都可独立地定义为输入或输出,因此既可作为8位的并行I/O口,也可作为8位的输入输出端。当工作在输入方式时,对应位的锁存器必须先置1,才能正确地读到引脚上的信号,否则,执行读引脚指令时,若对应位的锁存器的值为0,读的结果永远为0。-By 8051, composed of single-chip microcomputer system under normal circumstances, P0 timeshare I reuse as address, data bus, P2 I provide A15-A8 high eight address, P3 mouth for the second function, I usually only P1 for I/0 I. P1 I was eight quasi-two-way port, it can be independent of each and every defined as input or output, it can be used as 8-bit parallel I/O port, can also be used as 8-bit input and output side. When the work in the input, the corresponding bit latch must first buy one in order to correctly read the signal pin, or pin the implementation of reading instruction, if the corresponding bit latch the value of 0, Reading the results of Forever to 0.
- 2023-08-10 04:55:03下载
- 积分:1
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液晶模块FYD12864
液晶模块FYD12864-0402B使用手册.-LCD Module FYD12864-0402B User
- 2022-03-11 17:40:56下载
- 积分:1
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iccavr的一个实例,帮助初学者熟悉icc熟悉avr单片机
iccavr的一个实例,帮助初学者熟悉icc熟悉avr单片机-iccavr an example to help beginners familiar with familiar with the avr Singlechip icc
- 2022-03-18 01:02:07下载
- 积分:1
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CH375的USB或USB设备驱动程序的Windows DLL和DLL
CH372或CH375的USB设备的Windows驱动程序和DLL动态库-CH375 USB or USB Device Driver for Windows DLL and DLL
- 2022-03-07 13:59:43下载
- 积分:1
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例子Proteus经典例子和中文资料 8051
例子Proteus经典例子和中文资料 8051-Examples of classic examples of Proteus and Chinese information 8051
- 2022-01-25 20:18:20下载
- 积分:1
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这是一个单片机控制DS18B20芯片测温度的程序,十分简洁和经典,如果有需要的朋友就下载吧...:)...
这是一个单片机控制DS18B20芯片测温度的程序,十分简洁和经典,如果有需要的朋友就下载吧...:)-This is a single-chip control DS18B20 chip temperature measurement procedure is very simple and classic, if there is a need friends to download it ...:)
- 2022-01-30 23:58:15下载
- 积分:1
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Atmel Uart C51程序(timer2方式)
Atmel Uart C51程序(timer2方式)-Uart (timer2 way)
- 2022-07-21 19:51:19下载
- 积分:1
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KEIL的接口函数,对于打算做仿真器的朋友可能有帮助
KEIL的接口函数,对于打算做仿真器的朋友可能有帮助-KEIL interface function, for the intention to make the simulator might be helpful to Friend
- 2022-09-24 15:20:03下载
- 积分:1
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dsPIC33做的数据记录仪,用的MCU是dsPIC33FJ12GP201,数据存储器用的铁电FRAM:FM24CL64...
dsPIC33做的数据记录仪,用的MCU是dsPIC33FJ12GP201,数据存储器用的铁电FRAM:FM24CL64-dsPIC33 doing data logger, using the MCU is dsPIC33FJ12GP201, data memory using ferroelectric FRAM: FM24CL64
- 2022-01-25 18:07:44下载
- 积分:1
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AT89S51单片机测量电能表的应用实例,供大家参考。
AT89S51用于电能表的测量应用例子
供大家参考。-AT89S51 measurement for energy meter applications examples for your reference.
- 2022-01-27 17:48:36下载
- 积分:1