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Macronix Read-While-Write (RWW) Flash Now Adopted by Renesas’ Automotive Instrument Cluster RH850/D1M1A MCU

Date: 2018/08/06

​Hsinchu, Taiwan, 6th August, 2018 – Macronix International Co., Ltd. (TSE: 2337), a leading integrated device manufacturer in the Non-Volatile Memory (NVM) market, today announced that Renesas Electronics has implemented dedicated octa peripheral interface to support Macronix memory devices with Serial Multi I/O.  Among these memory devices, the MX25LW5124G Read-While-Write Flash is selected by Renesas for its high-end RH850/D1M1A automotive instrument cluster microcontroller (MCU) for Over-The-Air (OTA) update. The RH850/D1M1A is part of Renesas’ RH850 Family of MCUs that offers high performance balanced with very low power consumption over a wide and scalable range of automotive products.

Macronix’s Read-While-Write (RWW) Flash offers an ideal solution for Over-The-Air (OTA) update applications, which are becoming more prevalent within Automotive Cockpit solutions. Automotive Electronic Tier1’s are striving to meet end customer demand for the most updated features and changes in safety standards. One of the most cost effective methods is to have regular updates via OTA. During an OTA operation, the instrument cluster system might update data and code while in mid execution. In the past, to implement an Over-The -Air update, a system would typically execute a Simultaneous Read-While-Write (RWW) operation in two separate Flash devices – by writing to one Flash device while reading from another Flash device. In this scenario, the system would have to reserve double the normal bandwidth, which of course will lower performance, but also require significant redundancy in terms of Flash memory capacity.

The MX25LW51245G RWW Flash from Macronix provides multiple bank architecture with Simultaneous Read-While-Write capability that allows read access from one memory bank while writing to another memory bank. This feature enables the system to continue executing during the OTA update process happens in the background; furthermore, the system can roll back to its original firmware in the event of an OTA failure or data corruption.

Renesas has implemented dedicated octa peripheral interface to support Macronix memory devices with Serial Multi I/O, including the RWW Flash memory. Macronix’s RWW Flash memory is key to enabling customers to offer an effective, high performance and cost-effective OTA solution for a new generation of Instrument Clusters which will dramatically enhance the driver experience by offering configurable clusters with regular updates. Macronix’s RWW Flash memory solutions are manufactured with its own ultra-reliable, high quality 55nm Floating Gate technology, which is part of the 10-Year Macronix Product Longevity Program (MPLP).

About Macronix
Macronix, a leading integrated device manufacturer in the non-volatile memory (NVM) market, provides a full range of NOR Flash, NAND Flash, and ROM products. With its world-class R&D and manufacturing capability, Macronix continues to deliver high-quality, innovative and performance-driven products to its customers in the consumer, communication, computing, automotive, networking and other market segments.
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Michelle Chang
Corporate Communication Office
Macronix International Co., LTD.
TEL: +886-3-578-6688 ext. 71233
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