Domestic clock chip acceleration vehicle -level application

21st Century Business Herald reporter Luo Yiqi Guangzhou report

In most electronic products, clock chips are an indispensable existence. It is mainly used to update the state of electronic products, such as corrected time in communication products, and determined that the product is awakened or dormant in the Internet of Things products.

Among them, the chip used for correction time is called RTC (real clock chip). It is mostly used for communication scenarios or products. As the demand for vehicle communication increases, new development space has begun.

It is just that the RTC chip market has previously accounted for a high market share by overseas manufacturers such as Epson, and due to the high comprehensive requirements for reliability such as vehicle -level chips, in the field of high -precision RTC in automobile regulations, large domestic products have previously existed in the country. Competitive gap.

At the twelfth Songshan Lake China IC Innovation Summit Forum recently held, CTO Tian Xuehong, Guangdong Dapo Tongxin Technology Co., Ltd. introduced that the car is the most complicated terminal product for communication needs so far, but because there can be enough volume, electricity, electricity Support, compared to mobile phones, its tolerance can support communication indicators with higher performance requirements; higher -order communication modulation also brings more demanding requirements for clock noise. This is the new increase in RTC.

Among them, autonomous driving requires high -precision positioning as the core support, and the clock device is urgently needed to continue to greatly improve the stability. The challenges come from two aspects: such as weather factors and the impact of strong electromagnetic signals, or the signal of the ground device may be briefly blocked during the movement -therefore, it will completely depend on satellite signals and positioning will be easily disturbed.

The solution requires a high -stability local clock, which can correct the abnormal data caused by interference to ensure the stability of the positioning accuracy; and synchronize the high -performance local inertial navigation. In this way At the level of rice, of course, the current local habit is at a 1/1000 level, and there is still much room for improvement.

In addition, RTC, as the basic functional unit of multiple systems inside the car, is used in multiple system links, such as central control, instrument, smart cockpit, battery management system (BMS), etc. Its function is that on the one hand, as one of the sources of awakening, it can trigger BMS's management of its own working mode, such as dormant or operation; on the other hand, RTC is also the input conditions of the SOC battery management algorithm, which can be used to modify SOC regularly.

Tian Xuehong said that the RTC chip is a complex design project. It needs to combine the crystal characteristics and chip design to achieve a better performance state. The design threshold requirements are high. Taken together, there are three major requirements for the RTC of the automobile regulations: wide temperature areas, high reliability, high accuracy. Among them, the temperature of the temperature is up to 105 degrees; and the reliability is that if the device is required for 20 years, it is not dormant during this period.

During this time, Da NANA launched two vehicle -level high -precision RTC series chips Ins5A8900 and INS5A8804, which adopted the chip, high -precision temperature supplementary algorithm, and full -process automatic test system and equipment using independent research and development.

According to reports, Greater Communication has achieved full series of RTC, including ultra -high precision, low power consumption, high seismic resistance and other series. Products cover vehicle regulations and construction regulations to consumer levels. In terms of automotive regulations, it mainly covers three major areas: ultra -broadband vehicle communication, autonomous driving -level high -precision positioning, and car federation of Internet of Things.

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