Chapter 668 SoC
In fact, what Gao Zhendong said was a bit nonsense. Although he has completed most of the content, it is still a big challenge for these comrades to combine these contents together and complete the parts that need to be improved.

But these young comrades also know that, in fact, except for Gao Zhendong, their group of people are already the top talents in domestic IC design work. Apart from some teachers and some students from the 12th Ministry of Machine Building who are basically on par with them, there is no other force.

If we don’t go, who will?
What are you still hesitating about? What are you still afraid of?
We can't expect Professor Gao to finish everything, right?

Don't be timid, just do it!
Xiao Ye took the lead and patted his chest: "Professor Gao, don't worry, our 619 laboratory will definitely complete this work under your guidance!"

There are too few people, and the research institute's specifications are not up to standard, so this special IC research department of the National Defense Commission is called the 619 Research Room. Although there are not many people and the level is not high, the specifications are not low, and they are directly responsible to the Commission.

Gao Zhendong nodded and comforted them with a smile: "Don't worry, this matter is difficult in general, but it is not difficult for you. As for the remaining matter, it is much simpler than this."

The students were very curious, why was such a simple thing put at the end?
"While or after you complete the digital signal processor, remove the processor's hardware multiplier and other dedicated parts, leaving only the adder, controller, and necessary on-chip resources, interfaces, registers, and some memory. I will give you a specification for how much to leave, and it will also be made into a single-chip device."

"Professor Gao, is this very similar to the C6108 you made?"

Gao Zhendong smiled: "Well, you are very perceptive. You are right. It is indeed very similar to my C6108, but have you discovered its characteristics?"

Xiao Ye stayed with him the longest. Compared with other students, his systematic and organized thinking was the most advanced, so his reaction speed was also the fastest.

"Is this the monolithic design you mentioned? According to your design, this device theoretically only needs a power supply, a simple startup reset circuit, and an oscillation source to work. It is very simple. Moreover, the functions and performance of this device are basically suppressed to the lowest level, but the interface and resources are relatively complete."

The young man is pretty good. Gao Zhendong is quite happy: "Well, you have discovered the characteristics of this device. What are the uses of these characteristics?"

"The characteristic of this device is simplicity, very simplicity, whether in its internal structure or application. In this way, the cost should be very low... simple and cheap... Mr. Gao, do you want us to make a 'computer' that can be used in a large number of industries?"

"That's right! What I want you to do is to integrate all the functions of a simple computer on a single chip. We can call it a 'single-chip microcomputer'. Compared with C6108+C6110 and complete peripheral circuits, the application system cost of this single-chip microcomputer will be very low and can be used in a large number of simple control circuits. And with the development of chips, its cost advantage will become greater and greater." The young man is good and can think things through at once.

Single-chip microcomputer, SoC (System on Chip), integrates the entire system into a single chip. It is a concept that is often mentioned by self-media engaged in mobile phone reviews in the 21st century. In fact, it appeared very early and is not a term exclusive to mobile phone chips.

Even though the performance of 8-bit microcontrollers is not that good, their capabilities are more than enough for most applications. Moreover, the basis of Gao Zhendong's microcontroller is somewhat different from the 51 microcontroller he used in his previous life.

51单片机的一个机器周期是12个时钟周期（12T），而高振东这个单片机的基础，是用一个机器周期4个时钟周期（4T）的C6108改的，这就意味着一件事情。

Compared with C6108, this microcontroller has been castrated with unnecessary registers and other parts, but the computing speed has not been castrated.

That is to say, too complex calculations may be limited, but for simple calculations with a small number of operations, the microcontroller and C6108 are actually roughly the same.

Even if it runs at a low main frequency of 2.5MHz, its theoretical computing speed is roughly comparable to that of a 7.5MHz 51 microcontroller.

This speed seems very amazing at this time.

To illustrate how amazing this is, let's take a look at the situation decades later. The 11.0592MHz 12T Category 51 chips were still widely used until the 21st century, and in quite a few applications, the speed of this type of chip is still in a performance overflow state.

Thinking of this, Gao Zhendong casually painted a big picture for the students: "You work hard. If this thing is done well, the life cycle will be much longer than that of C6108. Decades later, I guess everyone will still remember you."

In fact, strictly speaking, Gao Zhendong is describing the future rather than making empty promises. Pieces of cake cannot be fulfilled, but what Gao Zhendong said is the real future.

As long as they are cheap enough and functional enough, these most basic components are actually more difficult to be eliminated than cutting-edge devices. Cutting-edge devices need to be updated and are easily replaced.

In the 21st century, the biggest improvement of 51-like chips, apart from the increase in main frequency due to the improvement of manufacturing process and the incorporation of more on-chip resources such as AD, DA, I2C, SPI, ROM, RAM, and UART, is that its core architecture and instruction set have basically remained largely unchanged.

If we talk about the real essential improvement, it is just that someone changed 12T to 1T, that's all.

As he expected, the young comrades in Room 619 became excited when they heard this.

Is this a record that will go down in history? Even if it’s just history within the industry, it’s still history.

For Chinese people, the appeal of these words is so great that the barbarians from other countries probably don’t quite understand it.

A group of young people instantly got excited, clamoring that they must do this job, even if they had to go without food or water!

Looking at their agitated appearance, Gao Zhendong smiled.

He took out two documents and handed them to the comrades in Room 619. They contained the specifications and plans of DSP and SoC.

This matter was naturally handed over to Xiao Ye, whose position in the committee was now under Room 619. Xiao Ye took the materials and knew exactly what Gao Zhendong was going to do without waiting for his instructions.

"I'll go back right now and organize everyone to write the research proposal! Get it done as quickly as possible!"

For Chief Engineer Gao's project, the project application is the easiest to write. Basically, you just need to fill in the necessary form items. As for the actual project content, Chief Engineer Gao has already prepared it.

As for the necessity and feasibility, which are the most troublesome aspects of project application, there is no need to worry about anything. Xiao Ye is not sure about other ministries and commissions, but at least in the National Defense Working Committee, General Gao’s project does not need to include a single word on these two aspects.

The reason is very sufficient, so keep it confidential.

If you really have to go through the motions, you can write it like this.

Necessity: High.

Feasibility: High total energy.
-

After arranging these two things, Gao Zhendong thought about it and realized that it seemed like no one had come from the laser gyroscope department of the original research institute for a long time.

It seems that the comrades in the original research institute have been making good progress, but people can't stand nagging, here it comes!
Engineer Mo brought a few people to the third factory.

Gao Zhendong was very happy that they suddenly came to visit him after a long absence.

Not coming for a long time means that things are going smoothly. After Gao Zhendong finalized the plan with them last time, there were no major problems with the entire plan, and any minor problems were easily solved by them.

Everyone is busy these days, and unless there is a need, there is probably no time to go around visiting people.

Their sudden visit must mean that things have changed significantly. Even if they had to come because they encountered a problem, it means that the situation has reached a critical point.

Inviting them to sit down in the office, Gao Zhendong made tea and said with a smile, "Engineer Mo, it's been a while since we last met. Is the laser gyroscope progressing well?"

Given their familiarity with the comrades in the original research institute and their work content, Gao Zhendong invited them into his office as soon as they arrived.

Engineer Mo did not look worried, and it seemed that things were going well. "Very good. The plan you agreed upon with us last time was very good. The Northeastern Institute of Optics you recommended is also very strong. The optical resonant cavity they built with the fused quartz you made also meets our requirements very well. Now they have built a prototype and have done a set of tests. The results are generally good."

Gao Zhendong put down the teacups for the others and picked up the test results he brought.

Gao Zhendong took a look and found it quite good. Although it did not reach the expected accuracy, the overall trend was visible, which was that they had really mastered the principles and applications of the laser gyroscope.

"Well, although the accuracy is a little bit off, there is no problem with the overall direction. Okay, that's great."

Mr. Mo was not complacent. If everything was fine, they wouldn't have to come today.

"Boss Gao, it's not completely okay..."

"Well, I know. I can see that. In general, the optical cavity length cannot be controlled, and the jitter difference frequency compensation in the locked area is also a bit outrageous."

Mr. Mo brought all the test records in detail, so Gao Zhendong could naturally figure out some clues.

After listening to Gao Zhendong's words, Mr. Mo was greatly impressed.

Being able to see that there is a problem with the data is a skill, but Gao Zhendong can immediately see the root cause of the problem based on the data. This skill is really amazing.

"Mr. Gao has a keen eye. These two problems are the main reasons why the prototype's accuracy did not meet expectations. To be honest, although we have found the problem, we still haven't been able to solve it."

Gao Zhendong put down the test record and said seriously: "Tell me the details."

"Let's talk about the control of the optical cavity length first. It is difficult to adjust the optical cavity length by purely mechanically controlling the position of the reflector, so we still use the solution you proposed, which uses piezoelectric elements to adjust the position of the reflector."

At present, it is still beyond our capabilities to use machinery to achieve this level of precision adjustment within the limits of volume and weight.

(End of this chapter)