site stats

Hc138_a p2 5

WebHC138 Product details. 1-of-8 Decoder/Demultiplexer High-Performance Silicon-Gate CMOS. The SL74HC138 is identical in pinout to the … 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...

【蓝桥杯单片机04】数码管的动态显示 - 小蜜蜂老师 - 博客园

Web10-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 local property tax amendment act 2021 https://lixingprint.com

STC89S51单片机 DS18B20温度显示到数码管上 - CSDN博客

WebApr 10, 2024 · B772. 10h 03m. Monday. 03-Apr-2024. 11:42PM PDT Los Angeles Intl - LAX. 05:38PM BST (+1) London Heathrow - LHR. B772. 9h 56m. Join FlightAware View more … WebVIH High-level input voltageHigh level input voltage CC = 4.5 V 3.15 V VCC = 6 V 4.2 4.2 VCC = 2 V 0.5 0.5 VIL Low-level input voltageLow level input voltage CC = 4.5 V 1.35 V VCC = 6 V 1.8 1.8 VI Input voltage 0 VCC 0 VCC V VO Output voltage 0 VCC 0 VCC V VCC = 2 V 1000 1000 Δt/Δv Input transition rise/fall timeInput transition rise/fall ... 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. gsm north carolina

解决数码管和LED显示干扰问题——蓝桥杯经验分享-物联沃 …

Category:使用DS1302模块参加蓝桥杯单片机比赛-物联沃-IOTWORD物联网

Tags:Hc138_a p2 5

Hc138_a p2 5

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

Web22 rows · HC138 Datasheet, PDF. Search Partnumber : Match&Start with "HC138" - … 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

Did you know?

Web公交车汉字显示系统哈 尔 滨 理 工 大 学毕 业 设 计 题 目: 公交车汉字显示系统 院 系: 荣成学院 电气工程系 姓 名: 于 洋 指导教师: 邹丽君 系 主 任: 王哈力 2013年 06 月 14 日公交车汉字显示系统摘 要本文 WebThe HC138 decodes a three−bit Address to one−of−eight active−low outputs. This device features three Chip Select inputs, two active−low and one active−high to facilitate the …

http://www.iotword.com/9899.html WebHC130-08V2 Datasheet Common mode chokes with Nanocrystalline cores & Common mode chokes with Ferrite cores - SMD format - PREMO CORPORATION S.L HC130-16H2 Breake Away Header .025(0.64mm) Square Posts, List of Unclassifed Manufacturers

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 ... WebHC138A Datasheet, PDF : Search Partnumber : Match&Start with "HC138"-Total : 2 ( 1/1 Page) Manufacturer: Part No. Datasheet: Description: QT Optoelectronics: HC138: 169Kb / 9P: HIGH SPEED TRANSISTOR OPTOCOUPLERS System Logic Semiconduc... HC138: 51Kb / 5P: 1-of-8 Decoder/Demultiplexer 1: 1: HC138A Distributor: Distributor: Part No. …

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 …

±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 ... gsmnp backcountry office phoneWeb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 log cabins irelandWebquent 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 … finance logistics operations planningWebJan 5, 2024 · 74HC573锁存器. 功能表. 电路连接图：. 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 … finance logbook templateWeb上面说到，无论是显示数码管还是led，都先要使能对应的锁存器。在蓝桥杯开发板中，锁存器的控制主要通过p25~p27即p2口的高三位来实现。 如果我们想要显示led，那么我们的第一步就是使能y4c，如上图，wr默认接地（io模式），接p42则为mm模式。 finance log splitter bad credithttp://www.iotword.com/10244.html gsmnp campground reservationsWeb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 … gsmnp backcountry sites