The shift register not only registers digital but also has a shift function. Shifting is a very important function in digital systems and computer technology. For example, if the operation of binary number 0101 is multiplied by 2, it can be realized by shifting 0101 to the left by one bit; and the operation of dividing by 2 can be realized by shifting one bit to the right. Four-bit left shift register =d 3 =1, other trigger output status is still 0, ie Industrial computers and commercial computers have always been inextricably linked. They each have their own application areas, but they affect each other and promote each other, reflecting the progress of science and technology. At present, it is better to do Sanqi Tuoda in China and Advantech in Taiwan. Advantech has a higher reputation, but its price is higher. The industrial computer site can be embedded in the machine, cabinet or placed on the operation table, and it can be used as a man-machine display interface. It is used in telecommunications, electric power, multimedia, national defense, automation equipment, manufacturing and other fields. It is used as a man-machine interface, thin client, PLC and POS communication and control terminals. Digital hospitals are used as bedside service terminals and outpatient terminals to improve hospital service and management. Banks, shopping malls, hotels, railway stations, buses, subway stations, parks and other public places as media (advertisement) players or inquiry terminals. High-end residential quarters are used as home service terminals to implement intercom, message, cost inquiry, product order, home appliance management, temperature and humidity control, etc. industrial pc,industrial computer,industrial touch computer,industrial computer waterproof,Fanless Industrial Computer,Panel Mount Computer Shenzhen Hengstar Technology Co., Ltd. , https://www.angeltondal.com
There are many types of shift registers, such as a left shift register, a right shift register, a bidirectional shift register, and a cyclic shift register.
Figure 9-14 shows four 
A four-bit left shift register consisting of flip-flops. Digital from the first trigger 
Serial serial input, use before use 
Clear each trigger. Now send the digital 1101 from high to low. 
end. 
=000,d 3 = 0001. After the second CP, 
=d 2 =1, 
=d 3 =1, and 
= 
=0. After four CP pulses, =d 3 d 2 d 1 d 0 =1101, the number of stores ends. The status of each output is shown in Table 9-6. If you continue to send four shift pulses, you can make the registered four digits 1101 bit by bit End output, this way of taking the serial output mode. Take the number directly from the parallel output mode.