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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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U-LINK的详细制作资料和原代码，电路图等资料。-U-LINK detailed information and the production of the original code, circuit diagrams, and other information.
- 2023-06-20 19:15:03下载
- 积分：1
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ATMEL 89sxx Series 51 Single
ATMEL 89sxx 系列51单片机下载线原理图
这是ATMEL公司的官方板-ATMEL 89sxx Series 51 Single-chip line schematic download This is the official board ATMEL Corporation
- 2022-04-27 16:19:37下载
- 积分：1
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- 2022-02-07 06:03:15下载
- 积分：1
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protel Ｄ X P 实 例 4
protel Ｄ X P 实 例 4-protel Ｄ X P 实 例 4
- 2022-07-07 18:42:14下载
- 积分：1
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AVR 单片机访问SD ,已编译通过了，大家可放心下载
AVR 单片机访问SD ,已编译通过了，大家可放心下载-web is good I want code from here.thank every body.
- 2022-08-02 16:07:00下载
- 积分：1
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飞利浦没有保证，表示，暗示或法定，包括但
包括读卡器源代码，专为研究RFID技术学习之用-Philips makes no warranty, expressed, implied or statutory, including but
* not limited to any implied warranty of merchantability or fitness for any
*particular purpose, or that the use will not infringe any third party patent,* copyright or trademark. Philips must not be liable for any loss or damage
* arising from its use.
- 2022-01-25 15:14:04下载
- 积分：1
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RTC实时时钟例程,可值参考移值使用.好就顶下.
RTC实时时钟例程,可值参考移值使用.好就顶下.-RTC Real Time Clock routine can shift the value of the use of reference values. Good on the top of the next.
- 2022-08-03 02:33:24下载
- 积分：1
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1602+ds1302时钟显示+ds18b20温度报警，原理图，资料和源码。
1602+ds1302时钟显示+ds18b20温度报警，原理图，资料和源码。-1602+ ds1302 clock display+ ds18b20 temperature alarm
- 2022-05-26 16:15:20下载
- 积分：1
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74ls165控制扫描键盘，串行输出键值的c51键盘程序，并在led上显示...
74ls165控制扫描键盘，串行输出键值的c51键盘程序，并在led上显示-74ls165 control scanning keyboard, serial output of the decoder keyboard keys procedures, and led the show
- 2022-01-21 17:56:39下载
- 积分：1
