Bluetooth® low energy microcontrollers for smart connectivity, with the lowest level of current consumption in the industry. Compact module with built-in 32 MHz crystal resonator for RF chip and antenna (already certified) is also available.Low Power Technology (3.0V / MCU part: STOP ):RF transmitter active: 4.3 mA (TYP.) RF receiver active: 3.5 mA (TYP.) On-Chip RF Transceiver: Bluetooth v4.2 Specification (Low Energy Single mode) 2.4 GHz ISM Band, GFSK modulation, TDMA/TDD Frequency Hopping (included AES encryption circuit) Adaptivity, exclusively for use in operation as a slave device Single ended RF interface 16-bit RL78-S2 CPU Core Main Flash Memory: 128 KB / 192KB / 256 KB (Block size: 1 KB) On-chip single voltage flash memory with protection from block erase/writing Self-programming with secure boot swap function and flash shield window function RAM: 12 KB / 16KB / 20 KB size Supports operands or instructions Back-up retention in all modes