MediaTek: Delivering High-Performance Automotive Infotainment Solutions

MediaTek, headquartered in Hsinchu, Taiwan, is the world’s fourth largest global fabless semiconductor company, powering more than 1.5 billion devices a year. The automotive market is one of the company’s core business focus areas, with automated driving considered its next frontier. Its Autus suite is an in-vehicle infotainment system that provides information for auto sensors, entertainment content, navigation, and more. The Autus I20 (MT2712) provides a high-performance, hexa-core infotainment system-on-chip (SoC) with a flexible interface and multi-display support.

Challenges

  • Serial link solution with robust data transmission and frame synchronization to support surround-view applications
  • High-current buck converter with 4A output current and dynamic voltage scaling for DDR rail

Solutions

Benefits

  • 15m transmission distance with robust transmission quality from deserializer
  • EMI mitigation thanks to spread-spectrum feature in deserializer
  • Support for multiple DDR types via dynamic voltage scaling
  • Single-chip deserializer simplifies design

MediaTek’s Autus I20 reference design provides a high-performance, hexa-core infotainment SoC with a flexible interface and multi-display support. MediaTek’s Autus I20 reference design provides a high-performance, hexa-core infotainment SoC with a flexible interface and multi-display support.

Challenges

To enable its Autus I20 SoC-based reference design to support surround-view applications, MediaTek needed a SerDes link solution that provides robust data transmission, such as 15m guaranteed SerDes link distance. Ideally, the deserializer would have four input channels with frame synchronization in a single chip to realize surround view. The company also sought a SerDes link solution with a MIPI CSI-2 output interface to a companion with its SoC.

To support different types of DDR memory, the company needed a high-current buck converter with 4A output current and dynamic voltage scaling for the DDR rail.

Solution and Benefits

To meet the requirements of its Autus I20 SoC reference design, MediaTek selected Maxim’s MAX9286 quad 1.5Gbps gigabit multimedia serial link (GMSL) deserializer; MAX96705 16-bit GMSL serializer with high-immunity/bandwidth mode; MAX15007C 40V, ultra-low quiescent current linear regulator; MAX8902B low-noise, 500mA LDO regulator; and a high-current buck converter with dynamic voltage scaling. While the company evaluated other automotive ICs on the market, it chose these Maxim parts because they met its criteria. For example, the MAX9286 provides 15m transmission distance and, to mitigate electromagnetic interference (EMI), a spread-spectrum feature.

In their reference design, the high-current buck converter, with its dynamic voltage scaling capability, allows MediaTek to change the output voltage via I2C to accommodate different DDR types. The MAX9286 serves as a companion to four MAX96705 ICs. The MAX9286 provides a single deserializer chip to realize the surround-view application and, with its automatic frame synchronization feature, it can offload this effort from the SoC. In addition, its data error correction, control channel retransmission feature, and advanced diagnostic function contribute to very robust transmission quality.

“MAX9286 is highly integrated and can support up to four camera links. This compact integration takes up less space on the mainboard and also reduces the bill of materials cost for customers,” said MediaTek Corporate Vice President JC Hsu.