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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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该文件是关于AT892051 PWM电机控制信息的使用产生。
该文件是关于使用AT892051产生pwm控制的电动机的资料。-The document was produced on the use of AT892051 pwm motor control information.
- 2022-02-01 12:20:49下载
- 积分：1
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经过测试成功的PDIUSBD12与Mega8的连接代码，如有需要，可以下载，从PDISUBD12与S51单片机连接代码修改而来...
经过测试成功的PDIUSBD12与Mega8的连接代码，如有需要，可以下载，从PDISUBD12与S51单片机连接代码修改而来-PDIUSBD12 tested success Mega8 connection with the code, if necessary, can be downloaded from PDISUBD12 connection with the S51 code changes from single-chip microcomputer
- 2022-08-15 05:37:07下载
- 积分：1
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在微机上模拟I2C总线的设计中，用并行口的D0（PIN2）模拟SCL信号，用D1（PIN3）模拟SDA信号。根据IIC总线的电平规范...
在微机上模拟I2C总线的设计中，用并行口的D0（PIN2）模拟SCL信号，用D1（PIN3）模拟SDA信号。根据IIC总线的电平规范
-Computer simulation on the design of I2C bus with a parallel port D0 (PIN2) Analog SCL signal, with D1 (PIN3) Analog signal SDA. According to the IIC bus specification level
- 2022-03-16 07:37:53下载
- 积分：1
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本文详细介绍了4×4矩阵式键盘识别技术，内含详细的电路图和C51源代码。...
本文详细介绍了4×4矩阵式键盘识别技术，内含详细的电路图和C51源代码。-This paper describes a 4 × 4 matrix keyboard recognition technology, and contains detailed schematics and source code C51.
- 2022-03-21 17:52:05下载
- 积分：1
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DTMF encoder chip HT9200 51 interface program. R2 said input parameters to send...
DTMF编码芯片HT9200的51接口程序。输入参数R2表示发送数据个数，输入数据与发送数据与DTMF码的关系:00H-0 01H-1 02H-2 03H-3 04H-4 05H-5 06H-6 07H-7 08H-8 09H-9 0AH-A 0BH-B 0CH-C 0DH-D 0EH-* 0FH-#。详细说明参考文件内-DTMF encoder chip HT9200 51 interface program. R2 said input parameters to send data distribution, data entry and send data with the DTMF code : 00H-0 01H- 02H-2 Mr- 3 in the 04H-4 05H-5 06H-6 07H-7 08H-8 7-9 0AH-A 0BH- 0CH B-C 0DH-D 0EH-* 0FH-#. Detailed information paper
- 2023-04-26 11:30:03下载
- 积分：1
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pid控制的源程序，很不错的，请大家注意关注啊
pid控制的源程序，很不错的，请大家注意关注啊-pid control source, it is good, draw attention to concerns ah
- 2022-09-08 11:10:02下载
- 积分：1
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Floating point library for the 8052.
Floating point library for the 8052.
- 2022-11-08 15:25:03下载
- 积分：1
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FE42X单相防窃电电表DEMO(编译器 AQ430 AQ430 V2.0.6.5)
FE42X单相防窃电电表DEMO(编译器 AQ430 AQ430 V2.0.6.5)-FE42X single-phase防窃电meter DEMO (compiler AQ430 AQ430 V2.0.6.5)
- 2022-11-23 06:55:03下载
- 积分：1
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Vx1828点3.5"TFT屏的的源程序，提供给大家参考。
Vx1828点3.5"TFT屏的的源程序，提供给大家参考。-Vx1828 point 3.5
- 2023-04-24 13:00:03下载
- 积分：1
