This solution verification board is used to verify the functionality of the 28PIN 0.66-inch OLED display. In this verification board, the high and low levels of BS1 can be controlled by welding R6 and R5 to control the selection of communication methods; in SPI mode, D0 is the SCLK port and D1 is the SDIN port; in I²C mode, D0 is SCL port, D1 and D2 are connected to become the SDA port.
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