According to James Consulting, LAPIS Semiconductor, a globally renowned semiconductor manufacturer group, ROHM (Rom) recently announced the development of the RF LSI (Large Scale Integrated Circuit) "ML7404", which is very suitable for use as a product. The new field of networking (IoT) wireless communication is expected to be a low power wide area network (LPWA). The ML7404 is the industry's first wireless communication LSI to support LPWA dual-mode functions. It not only supports the Sigfox standard, which is widely used in more than 30 countries and is popular in metropolitan areas including Japan (subscription-based LPWA, which does not require authorization). Sub-GHz), also supports the international standard IEEE802.15.4K featuring "strong interference against the same system" and "more terminals in the network". Its dual-mode communication function is expected to show its strength in a wide range of applications/specifications.
The communication module equipped with this product will be sold by Lappe Semiconductor's partner company to simplify the development of LPWA-compatible devices, which will help improve IoT applications. In addition, the IEEE802.15.4k protocol stack for this product will also be open sourced by a cooperating stack vendor. In recent years, LPWAs using sub-GHz bands that do not require radio frequency authorization have received attention from IoT applications. However, since the specific communication protocols vary from country to country, the IoT networks currently in use are still in the array and have not yet formed industry standards. LPT Semiconductor has previously introduced the wireless communication LSI for specific low-power wireless base stations in the SubGHz band, which has contributed to the global intelligence of the Internet of Things. This time, we have developed LPWA devices that support multiple methods, which is conducive to launching the IoT network as soon as possible and effectively popularizing services and applications.
Product Features 1. Support for Sigfox and IEEE802.15.4k LPWA Dual Mode ML7404 is a dual mode LPWA wireless communication LSI compatible with IEEE 802.15.4k and the Sigfox standard mainly used in Europe. a) Compatible with Sigfox Standard Sigfox is an LPWA wireless communication system currently used in more than 30 countries around the world. b) Supporting the IEE802.15.4k standard The IEEE 802.15.4k standard is characterized by its DSSS (Direct Sequence Spread Spectrum) based on orthogonal spreading codes and is resistant to other spread spectrum communication methods. The same system has strong interference capability. In addition, it can accommodate more terminals on the same network. The protocol uses a highly reliable sub-GHz band that does not require authorization.
2. The industry's first BPSK (Binary Phase Shift Keying) modulation circuit for Sigfox is hardware-based, helping applications to achieve lower power consumption. Sigfox uses BPSK modulation not used in previous sub-GHz communications. the way. However, since LSIs that support the standard Sigfox do not support BPSK modulation, it is necessary to create BPSK symbol data through a microcontroller (MCU) software. This method must drive the microcontroller every time wireless communication is performed, generating unnecessary power consumption. The ML7404 not only supports Sigfox, but also hardwareizes the BPSK modulation circuit. In this way, the microcontroller does not need to involve the physical layer of wireless communication during the wireless communication work, so that the communication system can achieve lower power consumption.
The advantages of BPSK modulation hardwareization 3. Development Support System Complete The optional evaluation kit integrates sample programs (simple MAC) and various test scenarios, and a module reference design is currently available. In addition, the product also provides comprehensive support, including the ability to download a variety of manuals and tools from the Bluestone website (requires registration). In the future, the communication module equipped with this product and the low-power protocol stack for IEEE802.15.4k will be released by the cooperation company of Lanshishi Semiconductor. parameter
ML7404's main parameter sales plan - Product Name: ML7404- Sample available time: Currently available - Shipping time: December 2017 - Production: 100,000 / month - Packaging: Tape and Reel packaging (1000 / Volume) Applications Gas and water meters, sensor networks, building health monitoring, smart agriculture, security systems and other industrial applications that require long-range wireless communications. The term explains the long-range wireless standard in the IEEE 802.15.4k international standard IEEE series. Receive sensitivity is improved by direct sequence spread spectrum (DSSS) to achieve long-distance communication. In the IEEE 802 series, physical layers such as wireless LAN, Bluetooth, ZigBee, and Wi-SUN have also been standardized. DSSS (Direct Sequence Spread Spectrum) A spread spectrum method that spreads and transmits a baseband signal over a wide frequency band. Pseudo-noise spreads the frequency by despreading at the time of reception, providing greater immunity to interference. About ROHM Group ROHM Semiconductor is the industry leader in system LSI, discrete components and module products; enabling ROHM to respond quickly to changing market demands with proprietary leading edge semiconductor technology and a complete internal vertically integrated production system While ensuring unparalleled quality and reliability. ROHM has also established a global manufacturing, quality inspection and sales network to provide stable supply and timely support to customers around the world. Lanshishi Semiconductor acquired the semiconductor business from OKI in 2008 by ROHM Group. Lattice Semiconductor offers market-leading logic, memory and display driver LSIs through the use of low power, high frequency circuits and digital-to-analog mixed-signal technology. It also provides foundry services for custom products from other companies. ROHM recently announced the industry's smallest (1608 size) two-color chip LED, the SML-D22MUW. In addition to the size breakthrough, the SML-D22MUW has a special design that improves reliability and back electrode configuration, supporting high resolution displays. Further reading: "RF Power Market and Technology Trends - 2017 Edition" "Mobile RF Front-End Modules and Components - 2017 Edition" "2016 Top 30 MEMS Companies in the World Ranked, RF is Changing the MEMS Industry Pattern"
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