The evaluation board is based on CH9141K and is made according to the schematic diagram shown below. The minimum system circuit of the CH9141K is very simple, requiring only one crystal oscillator and two capacitors. After powering the evaluation version (2.5-3.6V), data transmission between the serial port and Bluetooth can be easily realized.
· Support broadcast mode, host mode and slave mode
· Support serial port AT configuration and Bluetooth transmission configuration
· Provide computer side Bluetooth virtual serial port driver
· Compatible with existing serial port software and tools, no need for secondary development
· Blackout sleep current 0.3uA
· Transmission distance of 100 meters
· Transmission power is adjustable at 8 levels
· Support 33V and 25V working voltage
· Maximum baud rate of asynchronous serial port 1Mbps
· Serial port supports 5/6/7/8 data bits and 1/2 stop bits
· Serial port supports parity, even, no check, blank 0, flag 1 and other check modes
· Support to obtain chip supply voltage parameters
· External crystal oscillator is available for 32K clock source
