WK2168 is a 4-channel UART device with low power consumption of 256-level FIFO and supports UART/SPITM/IIC/8-bit parallel bus interface. The chip can work in any of the above main interface modes through mode selection, and the selected main interface can be expanded into four UARTs with enhanced functions. The mode can be selected by shorting it with a jumper cap. In other modes, the 8-bit parallel port pins can be used as GPIO pins.
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