Data Sheet

Wi-linktech Communication Technologies
(Shanghai) Co.,Ltd.
2020.03
www .w i - li nk te ch .c om
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3.3 UART Interface
The module supports UART (universal asynchronous transceiver) and realizes full
duplex transmission and reception through TX and RX interfaces.
。
图 3- 2 UART Communication
As shown in figure 3-2, the sent data is written to the TX buffer, and the UART
module uses the TX pin to extract the data from the TX buffer transferred to other
devices, the data received by the RX pin is first sent to the RX buffer and then
through the MCU or DMA Read.
4. Reference Design
4.1 Reference schematic
Figure 4- 1 reference schematic diagram
Note：Boot pin is pulled high for download mode and pulled low for normal operation (or
suspended)。