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RS-485接口具有较强的抗干扰性,数据传输的距离较远,在一些应用中常常需要把RS-232标准的信号转换为RS-485的标准信号进传输。图中所示电路允许数据在RS-232/RS-485这两个不兼容的串行数据接口间传递。传输速度为480波特时,传输距离可达1750米。图中双RS-232收发器IC1将主机(PC)输出的RS-232电平转换为TTL电平,驱动高速RS-485收发器IC2 的输入,倒相器使IC2、IC3在受到起始位时被激活。-RS-485 trying to lay all the thoroughly bleed at the nose picking up the birthday 扰 fern cavity 强 , Chu Huai basin cavity beat escapement for the birthday candle远Now , Which instance, using Beckmannia中
- 2022-02-04 11:12:39下载
- 积分:1
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- 2022-03-07 21:40:13下载
- 积分:1
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RC500开发一套完整的信息,并进行了详细的测试…
RC500开发全套资料,内有详细经过测试详细资料。-RC500 development of a full set of information, which has been tested in detail more details.
- 2022-05-13 09:54:02下载
- 积分:1
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本程序主要通过外部中断INT0及3.3端口读取PS2键盘值并通过LCD1602显示,键扫描码的解码通过数组方式解码,程序的解码功能主要针对数字及大小写字母和常用...
本程序主要通过外部中断INT0及3.3端口读取PS2键盘值并通过LCD1602显示,键扫描码的解码通过数组方式解码,程序的解码功能主要针对数字及大小写字母和常用标点符号
硬件描述:PS2键盘的时钟线(clk)接89S51的INT0(P3.2),数据线data接(P3.3)
LCD的控制端口分别为: RS = P2^7,RW = P2^6,EP = P2^5,数据端口为P0,液晶显示偏压VL必须接
-This procedure mainly through external interrupt INT0 and 3.3 read PS2 keyboard port value through LCD1602 display, key scan code decoder way through an array of decoding, the procedure for decoding function of the major figures and upper and lower case letters and punctuation marks commonly used hardware description: PS2 keyboard clock line (clk) then 89S51 the INT0 (P3.2), data lines data access (P3.3) LCD control port, respectively: RS = P2 ^ 7, RW = P2 ^ 6, EP = P2 ^ 5, data ports for the P0, LCD bias VL must be received
- 2022-03-05 07:16:47下载
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AD813AN是一款很好的视频转换芯片,能够实现低功耗!
AD813AN是一款很好的视频转换芯片,能够实现低功耗!-AD813AN is a good video conversion chip that can realize low-power!
- 2023-06-01 22:30:03下载
- 积分:1
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印刷电路板。键盘控制,矩阵键盘电路。
PCB电路板。键盘控制,矩阵键盘的电路图。-PCB circuit boards. Keyboard control, matrix keyboard circuit.
- 2023-09-01 07:40:04下载
- 积分:1
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51单片机的122×32点阵液晶底层驱动程序
51单片机的122×32点阵液晶底层驱动程序-51 SCM 122 × 32 dot matrix LCD driver bottom
- 2023-04-06 09:25:04下载
- 积分:1
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在C51下编写的频率计函数,可以对测得输入信号的频率
在C51下编写的频率计函数,可以对测得输入信号的频率-Prepared in the C51 Cymometer function, can be measured by the frequency of the input signal
- 2022-01-24 14:00:22下载
- 积分:1
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这是初学单片机实验程序,希望单片机初学者快点进步
这是初学单片机实验程序,希望单片机初学者快点进步-This is a beginner Singlechip experimental procedures Singlechip beginners progress quickly
- 2022-07-13 22:34:48下载
- 积分:1
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英飞凌C166之XC164CS定时器程序
英飞凌C166之XC164CS定时器程序-Infineon C166
- 2022-01-25 14:10:41下载
- 积分:1