Yichip YC1021蓝牙芯片数据手册以及管脚定义，网上根本下载不到。General Description The YC1021 is a very low power, high performance and highly integrated Bluetooth 4.2 BR/EDR + BLE + 2.4G Proprietary triple-mode solution, designed for operation over the 2400MHz to 2483.5Mhz ISM frequency band. YC1021 is manufactured using advanced 55nm CMOS low leakage process, which offers highest integration, lowest power consumption, lowest leakage current and reduced BOM cost while simplifying the overall system design. Rich peripherals including an 8 channel general purpose ADC, power-on-reset (POR), Arithmetic Accelerators, 3axis Q-decoder, ISO7816, UART/SPI/I2C and up to 32 GPIOs, which further reduce overall system cost and size.