STMicroelectronics BlueNRG-1

High performance, ultra-low power ARM Cortex-M0 32-bit based architecture core - Upgradable BLE stack (stored in embedded Flash memory, via SPI) - AES security co-processor - Low power modes - 16 or 32 MHz crystal oscillator - 12 MHz ring oscillator - 32 kHz crystal oscillator - 32 kHz ring oscillator - Compliant with the following radio frequency regulations: ETSI EN 300 328, EN 300 440, FCC CFR47 Part 15, ARIB STD - Operating temperature range: -40 to 85 Celsius