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Hc138_a p2 5

Web#include "reg52.h" sbit HC138_A = P2^5; sbit HC138_B = P2^6; sbit HC138_C = P2^7; void Init74HC138(unsigned char n) { switch(n) { case 4: //LED HC138_A = 0; HC138_B = 0; … WebJan 5, 2024 · 通过控制p2.7、p2.6、p2.5三个引脚的电平，便可以控制输出哪一位有效，进而去控制不同模块。例如，分别给p2.7、p2.6、p2.5引脚1、0、0，便可以控制y4为有效，此时y4为低电平。经过74hc00反相后变为高电平，此时输出的y4c为高电平。

STC89S51单片机 DS18B20温度显示到数码管上 - CSDN博客

Webquent filing- 5% of tax not paid by the original due date for each month or part of month of delinquency. For delinquent payment- 1/2 of 1% due for each month or part month of … WebOct 15, 2024 · 74HC138 是一款高速CMOS器件，74HC138引脚兼容低功耗肖特基TTL（LSTTL）系列。. 74HC138译码器可接受 3位 二进制加权地址输入（A0, A1 … gsm tri band phone https://joaodalessandro.com

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WebHigh Speed CMOS Logic 3-to-8 Line Decoder Demultiplexer Inverting and Non-Inverting. Data sheet. CDx4HC138, CDx4HCT138, CDx4HC238, CDx4HCT238 High-Speed … WebApr 11, 2024 · 例如上图 ，OE已经接地，既OE已经为低电平。. 当LE为高电平，既Y7C为高电平时，输入与输出端接通。. 例如在蓝桥杯单片机上的简单应用（蓝桥杯单片机使用了38译码器来控制573锁存器的功能）：. #include . sbit HC138_A=P2^ 5; sbit HC138_B=P2^ 6; sbit HC138_C=P2^ 7 ... ±4-mA Output Drive at 5 V; Low Input Current of 1-µA Maximum; Active Low Outputs ( Selected Output is Low) Incorporate Three Enable Inputs to Simplify Cascading or Data Reception; The SNx4HC138 devices are designed to be used in high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high ... finance of america eagle idaho

SNx4HC138 3-Line To 8-Line Decoders/Demultiplexers …

Category:HC138 Datasheet, PDF - Alldatasheet

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Hc138_a p2 5

3-to-8 line decoder/demultiplexer; inverting - Nexperia

Web2013-10-28 · 超过14用户采纳过TA的回答. 关注. 应该是你的138的译码器的地址端A连接到了单片机引脚P2^2，这行代码sbit HC138A = P2^2;只是一个定义，这样你对HC138A 的读写就相当于对单片机引脚P2^2的读写。. 其他两个类似。. 抢首赞. 评论. 分享. 举报. WebCreate a single 16-bit output bus named p (for product terms) and connect the appropriate halves of it to the outputs of the hc138 instances. Create dataflow expressions to form NAND expressions of the p elements. For each expression that has more than three product terms, implement it using an AND of the appropriate product terms.

Hc138_a p2 5

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Webfunction allows easy parallel expansion to a 1-of-32 (5 to 32 lines) decoder with just four '138 ICs and one inverter. The '138 can be used as an eight output demultiplexer by using … Web因此，假如我们想要使第一个数码管显示0，我们应该先选择数码管，再给段码值。. 第一步，使能Y6C：. 第二步，向P0赋值0x01，选择第一个数码管：. 第三步，使能Y7C：. 第四步，向P0赋值0xc0（共阳），让数码管显示0：. #LED显示. 蓝桥杯开发板上的LED接法为阳极 …

Web蓝桥杯单片机第十二届第一场省赛坑1坑2坑3坑4坑5坑6坑7坑8 仅记录试题中可能存在的坑。 源码和PDF题目0积分下载 坑1 hex文件是自动生成的， 没 记错的话是和工程名相同。 Web74HC138DB - The 74HC138; 74HCT138 decodes three binary weighted address inputs (A0, A1 and A2) to eight mutually exclusive outputs (Y0 to Y7). The device features three enable inputs (E1, E2 and E3). Every output will be HIGH unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion to a 1-of-32 (5 to 32 …

Web#include "reg52.h" sbit HC138_A = P2^5; sbit HC138_B = P2^6; sbit HC138_C = P2^7; void Init74HC138(unsigned char n) { switch(n) { case 4: //LED HC138_A = 0; HC138_B = 0; HC138_C = 1; break; case 5: //蜂鸣器与译码器 HC138_A = 1; HC138_B = 0; HC138_C = 1; break; case 6: //数码管位置 HC138_A = 0; HC138_B = 1; HC138_C = 1; break; case 7: // … WebNov 17, 2024 · 首先让8路led指示灯闪烁3遍后熄灭，接着依次点亮led指示灯，继电器吸合一会后断开，然后依次熄灭led指示灯，蜂鸣器鸣叫一会后关闭，程序循环实现上述功能。在上次学的led跑马灯的基础上改#include "reg52.h"sbit HC138_A = P2^5;sbit HC138_B = P2^6;sbit HC138_C = P2^7; //注意是P2void delay(u...

WebApr 12, 2024 · 摘要 本设计以stc89s51单片机为核心的温度控制系统的工作原理和设计方法。温度信号由温 度芯片ds18b20采集，并以数字信号的方式传送给单片机。文中介绍了该控制系统的硬件 部分，包括：温度检测电路、温度控制电路。

Web因为c51只有一组数码管，但是我们需要显示的东西有很多，所以通过按键切换是我们必须要知道的. 按键之间有嵌套，切换，计数，对于按键的使用我们是必须知道的 finance of america going publicWebHIGH SPEED TRANSISTOR OPTOCOUPLERS, HC138 Datasheet, HC138 circuit, HC138 data sheet : QT, alldatasheet, Datasheet, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs and other semiconductors. gsm unlock codesWeb10-Mar-2024. 03:50PM EST Reagan National - DCA. 05:13PM EST Buffalo Niagara Intl - BUF. CRJ7. 1h 23m. Join FlightAware View more flight history Purchase entire flight … finance of america hrhttp://www.iotword.com/8331.html gsm treatmentWebMay 23, 2013 · N-channel MOSFETs (6) in common-gate configuration with sources driven from the HC138 outputs and gates tied to +5V, with drains driving the gates of P-channel MOSFETs (6) with their sources connected to the high positive supply and their drains driving the common anodes. 5. Two sets of eight N-channel MOSFETs (16 total) with … finance of america construction loansWebCS 6750 HCI Assignment P1-1.5.pdf. 3 pages. Assignment P3 _ OMS CS6750.pdf Georgia Institute Of Technology Human-Computer Interact CS 6750 - Spring 2014 ... CS6750 … gsm unlocked cell phones walmarthttp://www.iotword.com/10244.html gsm unlocked cell phone walmart