3.4.8.1 mikroBUS 1 Connector

The first mikroBUS socket (J25) implements all mikroBUS features, as shown in the schematic below. The reset feature is ensured (by default) by the PIO port PC9 and can be swapped to the system reset line or peripheral reset line by moving resistor R224 to R222 or R223, respectively.

The first mikroBUS interface features an SPI bus shared with the second mikroBUS interface. Each interface has its own Chip Select line to its SPI interface (PA15 for the mikroBUS1 interface).

The first mikroBUS interface features a two-wire interface (PC6 and PC7) shared with the second mikroBUS interface and with the 40-pin RPi connector. The end user must pay attention to the I²C addresses used on these nodes.

The PWM feature of the first mikroBUS interface (PB15) is shared with the green junction of the D11 RGB LED.

To evaluate the CAN-FD interface, use selected mikroBUS click boards having the CAN-FD transceivers implemented in place of the standard UART RX/TX signals.