Bluetooth SoC is optimised for small, wearable applications

Designed for use in Bluetooth low energy applications, such as beacons or smart sensing wearables, the EM9304 is based on Bluetooth 4.2. The small, low power, SoC is from EM Microelectronic, the semiconductor company of the Swatch Group.

It can be used standalone, or connected to a variety of sensors with standard serial interfaces. It has a powerful yet low-power 32bit processor with a floating point unit (FPU) and on-chip non-volatile memory (NVM). Alternatively, the EM9304 can be connected with a standard MCU or custom ASIC, to add the Bluetooth low energy function to existing applications.

According to the company, the EM9304 is the smallest Bluetooth low energy v4.2 SoC available. It has a 2.4GHz transceiver with what is claimed to be state-of-the art receiver sensitivity, together with programmable transmit power for optimised current consumption. The SoC includes an on-chip power management system with automatic configuration for 1.5 or 3.0V batteries. It is compatible with standard 1.5V MCUs such as low power watch microprocessors from the company, or with standard 3.0V microprocessors from other vendors. The EM9304 has 128kbyte one time programmable (OTP), 48kbyte RAM to support application development, and up to 20kbyte RAM.

Firmware over-the-air (FOTA) updating routines that can run per application, function, or configuration to minimise download time.

Hardware and software development kits are available and include commercially available tools with an IDE and debugger.

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