| Applications Core Processor Program Memory Type Controller Series RAM Size Interface Number of I/O Voltage - Supply Operating Temperature Mounting Type Package / Case Supplier Device Package | RF4CE, Remote Control ARM® Cortex®-M3 FLASH (128 kB) STM32W 8K x 8 I²C, SPI, UART/USART 18 1.18 V ~ 3.6 V -40°C ~ 85°C Surface Mount 40-VFQFN Exposed Pad 40-VFQFPN (6x6) |