In layman's terms, the white box test in the software industry is to use the exhaustive method to run all the codes, and you can understand all the logical structures and logical paths after almost all the running.

When he heard these four words, except for Zhang Ke's confused expressions, everyone's expressions were different. Pan Xiaojun, who had a little understanding of programming, was puzzled. He knew that the white box test was software test, but he didn't know why it was used in a clean room.

Two of the three UMC engineers were the same as Pan Xiaojun at first, but they quickly guessed something and looked at Su Yuanshan with some shock.

Only Lin Yonggu could understand Su Yuanshan’s intentions when he heard those four words.

In the chip manufacturing industry, there is only one "white box test" that requires clean room use, which is to run microcode.

To put it bluntly, it is actually very simple. Open the cover, inversely push out the mask according to the layout of the transistor components, and then get the microcode - the microcode resides in high-speed memory, translates the machine instructions into a detailed circuit operation sequence, and control logic gates complete the output of 0 and 1.

The transistor layout is visible, while the microcode is not visible. Only one group of engineers can describe the functions of the microcode, and the other group of microcodes with the same function without referring to the original microcode - this is the white box test in the clean room.

This is how am386, which was just launched last month.

Lin Yonggu looked at Su Yuanshan's outrageous face and smiled calmly, knowing that his understanding was correct. He took a light breath and asked in unstandard Mandarin: "Do you want to learn amd?"

Su Yuanshan nodded: "I have this plan."

"It's too difficult." Lin Yonggu smiled generously. From the moment he came into contact with Pan Xiaojun, Pan Xiaojun kept introducing Su Yuanshan - so he knew that this young man, who was only eighteen years old, had the talent for programming and electronic circuit design that was jealous.

But having talent does not mean having unlimited abilities.

Lin Yonggu smiled and shook his head: "It took three years for amd to reverse the trend to complete am386, and 486 is even more difficult - you have to know that they are still a group of veterans who play this."

Su Yuanshan also smiled, and Lin Yonggu's last words were deeply loved by him. Amd started with various chips from copycat Intel since its establishment. Founder Sanders also said proudly, "We hope to become the second supplier of Intel, but we can't wait!" The implication is that brother, if you don't authorize, I will copy it first.

The most annoying thing is that the products produced by Amd are actually better than the genuine version of Intel, and even entered the military market. It is not an exaggeration to say that they are veterans of copycats.

"You have to give it a try, what if it can work?" Su Yuanshan replied with a smile: "But let's not talk about this now. You are busy with your car. Let's settle down and rest first. You are not thinking about getting the CD and wanting to go back?"

Lin Yonggu also smiled and said, "Of course not."

"Then please."

...

My uncle and Pan Xiaojun took the three of them to the foreign-related hotel upstairs. After Su Yuanshan was sent to the door, he went back to Qin Weimin's office directly. Xi Xiaoding also left his luxurious chair that cost 800 yuan and came here to sit on the reception sofa with Qin Weimin and wait for Su Yuanshan.

“How to say it?”

"I just picked up a mouth casually and saw how it was reacting there." Su Yuanshan touched his lips, tore down a piece of dry skin, and smiled: "Anyway, let's rub it first, let's go in, and don't let the in and pull it down."

Listening to this guy speaks yellow, Qin Weimin and Xi Xiaoding laugh at the same time.

Faced with UMC's requirements, Su Yuanshan pulled Qin Weimin and Xi Xiaoding to analyze for a long time. Combined with Su Yuanshan's memory, the three of them finally analyzed a conclusion that UMC's chip design department currently has a sense of crisis in life and urgently needs to design NB products to establish their position.

Moore, one of the founders of Intel, proposed the "Moore's Law" that the number of transistors will double in two years, which has been confirmed by the development of the semiconductor industry for more than 20 years. Since there is a proven law that can predict the development trend of the semiconductor industry in the next few years, even more than ten years, UMC, which is the main business of wafer fabs, must consider whether its investment in wafer fabs can support itself in catching up with Moore's Law.

You know, there is a peer on the island that invests all resources into the wafer fabs. And that peer is ambitious and has received support from many companies. It is currently catching up with itself.

In this case, UMC had to consider increasing investment in wafer factories. In Su Yuanshan's memory, UMC did start to divest chip design business in 1995 to carry out professional chip foundry. Among these divested departments, there was a company that chose SoC design in later generations that was extremely eye-catching - it was called MediaTek.

It is also worth mentioning that UMC also "designed" a CPU based on the x86 architecture in 1994, but because it did not obtain Intel's authorization, it had to give up and not go public. It is hard to say whether this is the final sound that made UMC decide to divest the design business the next year.

The "design" here obviously refers to a copycat.

Su Yuanshan already felt that UD is probably now secretly using the x86 architecture to "design" or reverse Intel's 486. Otherwise, how could they explain that they would come so eagerly and ask Yuanxin to send a technical support team? It can only be that they are working on CPUs and are not skilled and need all-round support from EDA.

You should know that it is not the era of multi-level 3D circuit structures in later generations, a time when CPUs often have billions of transistors. In later generations, EDA engineers, chip designers, and wafer factory engineers, these three parties have worked together for a long time and promoted progress together - this is also one of the reasons why a CPU is the most cutting-edge technology and talents in mankind.

After figuring out the urgent needs of the UMC chip design department, the technical supervisor of the entire Yuanxin began to think about how to increase the benefits of this cooperation to the highest level. Finally, Su Yuanshan made a suggestion to allow UMC to open the clean room and allow UMC to reverse the direction - this is what it said on the surface, but the actual intention was to add UMC chip reverse to gain a large amount of experience value.

After laughing, Qin Weimin asked, "What if they don't agree? Let's just send one person?"

Su Yuanshan nodded: "Of course, our process design is the leading one now. At most, one person will be sent to adjust the tools and help connect to the machines."

"What if they agree if they have a hot mind? Which group do you send? Do we have so many candidates?" Xi Xiaoding frowned and said, "You have to know that reverse experience is best for chip designers and fab engineers to get it - it's useless for educators to eat it. Moreover, UMC's production line is the most advanced at present. Can our people eat those experiences? Don't say that we don't have the talents in chip production lines at all."

Su Yuanshan squinted his eyes and looked out, lowering his voice like a thief: "Senior Brother Xi, the people we sent here may not be our current employees! I've 'digged' a few people from Huajing Microelectronics. Do you think I can't dig it?"

Xi Xiaoding's eyes lit up immediately!

Qin Weimin slapped his thigh!

"This trick is great! I guess King Hua Jing will always cry and beg you to dig their people."

"Shh..." Su Yuanshan made a move to silence.

There are too few opportunities to access the latest production lines in China, or there is no chance at all! Now there is a front-line opportunity in front of you, so Su Yuanshan has to try it out.

Engineers of Huajing's fabs will gain even if they only look at them at this stage.

Of course, the premise is that UMC is willing to agree.

[Recommended ticket]
Chapter completed!