64 MHz Cortex-M4 with FPU 512/256 KB Flash, 64/32 KB RAM 2.4 GHz Transceiver 2 Mbps, 1 Mbps Bluetooth Low Energy Bluetooth mesh +4 dBm TX power 128-bit AES UART, SPI, TWI, PDM, I2S PWM 12-bit ADC NFC-A QFN48,6x6mm
Realtek 8762CK
ARM Cortex-M4 with floating-point unit (Maximum 40MHz) Serial flash controller (One and Qual-bits mode) with 16kB 4-way cache. Total 160kB SRAM 4Kbits eFUSE for manufacturer use Supports AES128/192/256 encrypt/decrypt engine Embedded 2Mbits flash (RTL8762CKF/RTL8762CJF) RTL8762CK-VD-CG; QFN-48,6x6mm2 Outline;‘Green’Package