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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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一个比较通用的行列键盘程序,c语言的
一个比较通用的行列键盘程序,c语言的-a more generic keyboard ranks procedures, c language
- 2023-02-25 07:15:03下载
- 积分:1
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Keil Cx51 V7_0单片机高级语言编程与_uVision2应用实践
徐爱均 彭秀华主编
电子工业出版社...
Keil Cx51 V7_0单片机高级语言编程与_uVision2应用实践
徐爱均 彭秀华主编
电子工业出版社-a classic mcu programming book about keil
- 2022-11-05 01:40:07下载
- 积分:1
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基于ATMGA8515L的PS2 键值显示
基于ATMGA8515L的PS2 键值显示 -Based on the PS2 keys ATMGA8515L Show
- 2022-05-17 00:08:34下载
- 积分:1
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AT90S8515控制4线两相步进电机。想做AVR控制步进电机的网友可以看看。...
AT90S8515控制4线两相步进电机。想做AVR控制步进电机的网友可以看看。-AT90C8515 control 4 wire 2 phase stepping motor. AVR control stepping motor .
- 2022-01-20 23:00:55下载
- 积分:1
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一种实用的12864 液晶驱动程序,已经有实物验证
一种实用的12864 液晶驱动程序,已经有实物验证
-12864 A practical liquid crystal driver, has been kind to verify
- 2023-08-18 12:00:03下载
- 积分:1
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Wide
全量程交直流无档电压表的设计 这里只给出了系统设计的方案 带有程序流程图-Wide-range AC-DC voltage meter free stall design here only gives the system design program with a program flow chart
- 2022-10-27 04:10:04下载
- 积分:1
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89C51 LCD常用的初始化文件,开发环境为iccavr
89C51 LCD常用的初始化文件,开发环境为iccavr-89C51 LCD common initialization file, the development environment for iccavr
- 2022-06-03 20:41:05下载
- 积分:1
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固态继电器g3cn中国数据。包括性能指标
固态继电器G3CN的中文资料。包括性能指标-Solid State Relays G3CN the Chinese data. Including performance indicators
- 2022-07-01 18:30:15下载
- 积分:1
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nios环境下数码管驱动芯片max7219驱动程序,封装了八位数码管同时显示任意数值和单个数码管显示数值程序...
nios环境下数码管驱动芯片max7219驱动程序,封装了八位数码管同时显示任意数值和单个数码管显示数值程序-Nios environment MAX7219 LED Driver IC driver, package of 8 At the same time, digital tube display and a single arbitrary numerical digital display numerical procedures
- 2022-02-04 03:51:53下载
- 积分:1