Laird Lyra S, User Manual

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The Lyra S Development Kit
features a mikroBUS™ socket
compatible with mikroBUS add-on boards. MikroBUS add-on
boards can expand the functionality of the kit with peripherals
such as sensors and LCDs. Add-on boards follow the
mikroBUS socket pin mapping, and communicates with the
on-kit Lyra S through UART, SPI or I
2
C. Several GPIOs are
exposed on the mikroBUS socket. MikroBUS add-on boards
can be powered by the 5V or VMCU power rails, which are
available on the mikroBUS socket.
The pinout of the Lyra S on the kit is made such that all
required peripherals are available on the mikroBUS socket.
The I
2
C signals are, however, shared with the Qwiic
connector, and all mikroBUS signals are also routed to
adjacent breakout pads.
When inserting a mikroBUS add-on board, refer to the
orientation notch on the Lyra S Development Kit, shown in the
figure below, to ensure correct orientation. Add-on boards
have a similar notch that needs to be lined up with the one
shown below.
Figure 7: mikroBUS add-on board orientation
The table below gives an overview of the mikroBUS socket pin connections to the Lyra P.
Pin Name Pin Function Connection Shared Feature Suggested Mapping
AN Analog PB00 BREAKOUT_RIGHT10 IADC0
RST Reset PC06 BREAKOUT_RIGHT9
CS SPI Chip Select PC03 BREAKOUT_RIGHT8 USARTx.CS
SCK SPI Clock PC02 BREAKOUT_RIGHT7 USARTx.CLK
MISO SPI Master Input
Slave Output PC05 BREAKOUT_RIGHT6 USARTx.RX
MOSI SPI Master Output
Slave Input PC04 BREAKOUT_RIGHT5 USARTx.TX
PWM PWM output PB04 BREAKOUT_LEFT10 TIMER0.CCx
INT Hardware Interrupt PB03 BREAKOUT_LEFT9
RX UART Receive PB02 BREAKOUT_LEFT8 USARTx.RX
TX UART Transmit PB01 BREAKOUT_LEFT7 USARTx.TX
SCL I2C Clock PD02 QWIIC_I2C_SCL, BREAKOUT_LEFT6 I2Cx.SCL
SDA I2C Data PD03 QWIIC_I2C_SDA, BREAKOUT_LEFT5 I2Cx.SDA
3V3 VCC 3.3V power VMCU Lyra S voltage domain 3V3
5V VCC 5V power 5V Board USB voltage 5V
GND Reference Ground GND Ground GND