• Huabang stacks two flash memory chips in a single package. One chip is used to perform write / erase operations, while the other chip can perform read operations at the same time, so as to achieve better OTA update.
  • Huabang spistack is equipped with a NAND flash memory with high capacity and fast writing, which can provide a suitable solution for OTA management applications of multiple ECUs.

Suzhou, China, December 23, 2021 – Huabang electronics, the global leader in semiconductor storage solutions, released its spistack today ® The product has unique advantages and can enable OTA firmware update of automobile and Internet of things devices. OTA update has become a key function of automotive, Internet of things and industrial applications. The innovative spistack solution provided by Huabang stacks two flash memory chips in a single package to enable the two chips to read and write at the same time, so as to help customers realize fast, reliable and risk-free OTA update.

Jooweon (JW) park, vice president of Huabang flash, said: “OTA firmware update needs to ensure the safety and reliability of its equipment while upgrading the firmware, and will not cause any interference to users. This is the premise for the wide application of OTA technology in the future, followed by the speed of Ota. When the spistack product system launched by Huabang performs OTA operation, it can help customers easily realize the above two requirements.”

Support OTA management of multiple ECUs

OTA firmware update of automotive electronic control unit (ECU) needs to run in a safe environment and consider the stability of wireless communication. Generally, the vehicle gateway is equipped with OTA manager, which is responsible for the update process of all ECUs in the vehicle, including task allocation and execution time.

It is very important that the OTA manager has the ability of fast writing, so as to quickly download the new version of firmware in a stable communication environment. Therefore, OTA manager is more suitable to be equipped with NAND flash memory with large capacity and fast writing. In the past, the vehicle gateway used nor flash memory to store the startup code and the new version firmware downloaded by other ECUs to achieve secure OTA firmware update. With nor + NAND combined flash memory, the vehicle gateway can quickly write the new version of firmware into NAND flash memory with high storage capacity, which can not only maintain the stability of its own startup code, but also have cost advantages. In addition, the floor area of nor + NAND spistack is the same as that of a single flash on the circuit board. Customers can directly replace nor flash with a nor + NAND flash to realize OTA management function with both stability and cost-effectiveness.

Spistack enabled OTA update

Huabang’s spistack series can stack multiple devices through SPI interface. Such a stack may be homogeneous, such as stacking two or more SPI nor flash memory or serial NAND flash memory; It can also be heterogeneous, for example, placing an SPI nor flash memory on a serial NAND flash memory.

Spistack provides designers with a faster and more successful OTA firmware update scheme than ever before. For example, an embedded system that uses a single chip 512Mbit nor flash memory for code storage, the packaging method is 8mm x 6mm WSON, which can be replaced by 512Mbit spistack with the same packaging method, that is, two 256Mbit nor flash memories stacked together. Spistack dual chip combination has read while write function suitable for OTA update, and there is no need to pause write / erase. Therefore, in case of accidental power failure, spistack will not lose existing firmware data.

At the same time, spistack still has the advantages of high capacity, the same cable design and fewer pins in small packages, which can reduce the circuit board area and make it easier to use. Moreover, the startup time of spistack is the same as that of SPI nor flash memory. Among them, the low delay of NOR flash memory can completely cover the initial delay of serial NAND, so as to realize the same fast start and the ability to arbitrarily read data in different positions as a single nor flash memory. Compared with writing data only to NOR flash memory, writing to NAND flash memory can save 90% of writing time. At present, the automatic grade 2 spistack stacking 1GB serial NAND and 16mb-128mb SPI nor has begun to send samples, which can provide customers with stronger product performance in practical applications.

Leave a Reply

Your email address will not be published. Required fields are marked *