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Hc138_a p2 5

Web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。 Web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 …

sbit HC138A = P2^2; //定义译码器输入端A 在 P2.2 管脚上。这是 …

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; … 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... celebs with best bodies https://horsetailrun.com

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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 ... WebAbout Texas Instruments. Texas Instruments (TI) is a publicly traded company that designs and manufactures semiconductor and computer technology products. It was founded in 1930 and is headquartered in Dallas, Texas. TI is a global leader in the production of analog and digital signal processing (DSP) integrated circuits, as well as embedded ... 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 … buy beadboard near me

HC573锁存器原理及在蓝桥杯单片机上的简单应用应 …

Category:蓝桥杯单片机组第七届省赛真题代码实现 (小蜜蜂老师版) （新手 …

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Hc138_a p2 5

SN74HC138 data sheet, product information and …

WebJan 11, 2024 · TM74HC138有三个使能控制端（E1 、 E2 、E 3），当E1 、E2为低电平且E3为高电平时，八个译码输出端才有译码输出，否则八个译码输出端将全为高。. … WebMC74HC138A www.onsemi.com 3 DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND) Symbol Parameter Test Conditions VCC V Guaranteed Limit −55 C to 25 C85 125 Unit VIH Minimum High−Level Input Voltage Vout = 0.1 V or VCC – 0.1 V Iout 20 A 2.0 3.0 4.5 6.0 1.5 2.1 3.15

Hc138_a p2 5

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WebSN74HC138PW TSSOP (16) 5.00 mm x 4.40 mm SN54HC138J CDIP (16) 21.34 mm x 6.92 mm SN54HC138W CFP (16) 10.16 mm x 6.73 mm SN54HC138FK LCCC (20) 8.89 mm x 8.89 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Pin numbers shown are for the D, DB, J, N, NS, PW, and W packages. 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 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 … Web广东职业技术学院 欧浩源. 在CT107D单片机综合训练平台实现LED的基本控制和其他单片机开发平台不一样，不单单是控制几个LED实现跑马灯这么简单。. 因为在这个平台上要掌握74CH138译码器和74HC573锁存器的使用才能实现对LED的基本控制。. 因此，这个单元的重 …

WebThe Parking Assist Control Module triggers the sensors in a sequential loop. After each sensor transmits, the Parking Assist Control Module uses the sensor echo received … 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单片机流水灯代码练习-MCU running light code exercise. Contribute to Achfi/--Microcontroller-code-exercise-01 development by creating an account on GitHub.

WebP2 & 0x1f ：0001 1111 0x80 ： 1000 0000 P2=(P2 & 0x1f) 0x80 ：1001 1111 得到 1001 1111 即 HC138_A = 0; HC138_B = 0; HC138_C = 1; Y4接通. 三、举一反三 3.1 P2=(P2 … celebs with big earsWebMar 23, 2024 · ds13b20是单总线外设，所以它对时序的要求较高，对ds13b20的使用关键是温度转换、读取以及对读取到的数值进行处理。ds18b20的基本概述 工作电压：3.0v~5.5v。 测量范围：-55摄氏度～+125摄氏度。 通信方式：单总线，数据线接上拉电阻，使总线空闲时 … celebs with blonde hair and brown eyesWebHC138 Product details. 1-of-8 Decoder/Demultiplexer High-Performance Silicon-Gate CMOS. The SL74HC138 is identical in pinout to the … celebs with blonde hair and green eyesWeb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 buy beaded dressesWeb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 … celebs with blue hairWebMay 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 … buy beaded door curtainWebquent 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 … celebs with blonde hair