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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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(AD9958 using ADuC845 control keil source code package, keyboard and display par...
(AD9958用ADuC845控制的keil源代码包,键盘和显示部分在另一个板上，通过串口发送指令和返回数据)
线路图在压缩包内-(AD9958 using ADuC845 control keil source code package, keyboard and display part in another on-board, through the serial port to send commands and return data) circuit diagram in the compression bag
- 2022-03-07 19:50:33下载
- 积分：1
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12232液晶模块的应用，该模块采用ST7920液晶控制芯片，编译菜用WinAVR2005....
12232液晶模块的应用，该模块采用ST7920液晶控制芯片，编译菜用WinAVR2005.-12232 Application of LCD module, the module used ST7920 LCD controller chip, the compiler vegetable WinAVR2005.
- 2022-11-13 09:55:02下载
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用单片机做的数字电子钟，12864＋ds18b20+ds1302,有纪念日提醒功能。...
用单片机做的数字电子钟，12864＋ds18b20+ds1302,有纪念日提醒功能。-Make use of single-chip digital electronic clock, 12864 ds18b20+ Ds1302, the anniversary has reminded function.
- 2022-02-25 12:49:30下载
- 积分：1
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ZLGFS文件系统源代码，支持FAT12,FAT16,FAT32文件系统。
ZLGFS文件系统源代码，支持FAT12,FAT16,FAT32文件系统。-ZLGFS file system source code, support for FAT12, FAT16, FAT32 file system.
- 2022-07-17 10:09:36下载
- 积分：1
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LT_1B msp430开发板例子程序－T3
LT_1B msp430开发板例子程序－T3
- 2022-06-17 01:22:06下载
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8051+ ds 1307
digital clock~~~~~~
8051+ds 1307电话
- 2022-10-30 19:35:03下载
- 积分：1
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AVR电压表。如何做个平台AVR电压表
Woltomierz dla AVR. Przyklad jak stworzyc woltomierz na platformie AVR
- 2022-01-23 10:31:48下载
- 积分：1
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Single
LPC900 FLASH单片机--红外多机通信应用实例-Single-chip LPC900 FLASH- infrared multi-machine communication applications
- 2022-03-25 07:00:26下载
- 积分：1
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供应链管理原理与实用技术
单片机原理与实用技术》第3章-SCM principles and practical technology, "Chapter 3
- 2022-03-18 17:56:40下载
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