Qwiic Carrier Board Hookup Guide
Contributors:
santaimpersonator, MAKIN-STUFF
Hardware Overview
This section will cover the various hardware components and solder jumpers on the MicroMod Qwiic Carrier Board. It will also review the connections of the M.2 connector and how it interfaces with a MicroMod Processor.
Board Dimensions
The Qwiic Carrier Board dimensions are:
- Single: 3.15" x 1.40" (80.00mm x 35.56mm)
- Double: 4.10" x 1.40" (109.22mm x 35.56mm)
Dimensions of the MicroMod Qwiic Carrier Board. (Click to enlarge)
The boards also include mounting holes and inserts for a standard 4-40 screw. The inserts are arranged to mount, attach, and/or stack compatible (1" x 1") Qwiic boards.
Mounting areas on the MicroMod Qwiic Carrier Board to attach Qwiic devices. (Click to enlarge)
Common Components
Most SparkFun MicroMod Carrier Boards will have some common components and all MicroMod Carrier Boards will have the keyed M.2 MicroMod connector for a Processor board. The photo and list below outline the common components between the Qwiic carrier board and other MicroMod Carrier Boards.
- M.2 MicroMod Connector - This special keyed M.2 connector lets you install your MicroMod Processor of choice to the Qwiic Carrier Board.
- USB-C Connector - Connect to your computer to program your processor and provide power to the board.
- 3.3V Regulator - Provides a regulated 3.3V and sources up to 1A.
- Qwiic Connectors - The standard Qwiic connectors to connect other Qwiic devices for your MicroMod project.
- Boot/Reset Buttons - Push buttons to enter boot mode on processors and to reset your MicroMod circuit.
Common MicroMod components featured on the MicroMod Qwiic Carrier Board. (Click to enlarge)
Battery Charger
The board also has a MCP73831 Single-Cell Lithium-Ion/Lithium-Polymer Charge IC so you can charge an attached single-cell LiPo battery. The charge IC receives power from the USB connection and can source up to 450mA to charge an attached battery.
Batery charger for the MicroMod Qwiic Carrier Board. (Click to enlarge)
Status LEDs
The carrier board has two status LEDs:
- PWR - This LED indicates when 3.3V power is available top the board.
- CHG - This LED indicates the status of the charging circuit operation.
Status LEDs on the MicroMod Qwiic Carrier Board. (Click to enlarge)
Solder Jumpers
Users who have never worked with soldering jumpers and cutting PCB traces before (or for a quick refresher), check out our How to Work with Solder Jumpers and PCB Traces tutorial for detailed instructions and tips.
There are four adjustable solder jumpers on the MicroMod Qwiic Carrier Board labeled MEAS, BYP, 3.3V_VE and 3.3V. The table below briefly outlines their functionalities:
| Jumper Name/Label | Description | Default State |
|---|---|---|
| Measure/MEAS | Open this jumper to probe the current draw at the 3.3V output of the regulator. For help measuring current, take a look at our How to Use a Multimeter tutorial. | CLOSED |
| Bypass/BYP | The "penny-in-the-fuse" jumper. Bypasses the 6V/2A fuse and nets VIN and V_USB together. Close only if you know what you are doing! | OPEN |
| Voltage Regulator Enable/VE | Voltage regulator control. Close this jumper to control the VREG in low-power applications. | OPEN |
| 3.3V LED Power/3V3 LED | Connects the 3.3V LED to 3.3V via a 1K Ohm resistor. Open to disable the LED. | CLOSED |
Jumpers on the MicroMod Qwiic carrier board. (Click to enlarge)
MicroMod Pinout
Since this Carrier Board is designed to work with all of the MicroMod Processors we've included the table below to outline which pins are used so, if you would like, you can compare them to the pinout tables in their respective Hookup Guides.
| AUDIO | UART | GPIO/BUS | I2C | SDIO | SPI | Dedicated |
| Function | Bottom Pin |
Top Pin |
Function | ||||||
|---|---|---|---|---|---|---|---|---|---|
| (Not Connected) | 75 | GND | |||||||
| 3.3V | 74 | 73 | G5 / BUS5 | ||||||
| RTC_3V_BATT | 72 | 71 | G6 / BUS6 | ||||||
| SPI_CS1# | SDIO_DATA3 (I/O) | 70 | 69 | G7 / BUS7 | |||||
| SDIO_DATA2 (I/O) | 68 | 67 | G8 | ||||||
| SDIO_DATA1 (I/O) | 66 | 65 | G9 | ADC_D- | CAM_HSYNC | ||||
| SPI_CIPO1 | SDIO_DATA0 (I/O) | 64 | 63 | G10 | ADC_D+ | CAM_VSYNC | |||
| SPI COPI1 | SDIO_CMD (I/O) | 62 | 61 | SPI_CIPO (I) | |||||
| SPI SCK1 | SDIO_SCK (O) | 60 | 59 | SPI_COPI (O) | LED_DAT | ||||
| AUD_MCLK (O) | 58 | 57 | SPI_SCK (O) | LED_CLK | |||||
| CAM_MCLK | PCM_OUT | I2S_OUT | AUD_OUT | 56 | 55 | SPI_CS# | |||
| CAM_PCLK | PCM_IN | I2S_IN | AUD_IN | 54 | 53 | I2C_SCL1 (I/O) | |||
| PDM_DATA | PCM_SYNC | I2S_WS | AUD_LRCLK | 52 | 51 | I2C_SDA1 (I/O) | |||
| PDM_CLK | PCM_CLK | I2S_SCK | AUD_BCLK | 50 | 49 | BATT_VIN / 3 (I - ADC) (0 to 3.3V) | |||
| G4 / BUS4 | 48 | 47 | PWM1 | ||||||
| G3 / BUS3 | 46 | 45 | GND | ||||||
| G2 / BUS2 | 44 | 43 | CAN_TX | ||||||
| G1 / BUS1 | 42 | 41 | CAN_RX | ||||||
| G0 / BUS0 | 40 | 39 | GND | ||||||
| A1 | 38 | 37 | USBHOST_D- | ||||||
| GND | 36 | 35 | USBHOST_D+ | ||||||
| A0 | 34 | 33 | GND | ||||||
| PWM0 | 32 | 31 | Module Key | ||||||
| Module Key | 30 | 29 | Module Key | ||||||
| Module Key | 28 | 27 | Module Key | ||||||
| Module Key | 26 | 25 | Module Key | ||||||
| Module Key | 24 | 23 | SWDIO | ||||||
| UART_TX2 (O) | 22 | 21 | SWDCK | ||||||
| UART_RX2 (I) | 20 | 19 | UART_RX1 (I) | ||||||
| CAM_TRIG | D1 | 18 | 17 | UART_TX1 (0) | |||||
| I2C_INT# | 16 | 15 | UART_CTS1 (I) | ||||||
| I2C_SCL (I/0) | 14 | 13 | UART_RTS1 (O) | ||||||
| I2C_SDA (I/0) | 12 | 11 | BOOT (I - Open Drain) | ||||||
| D0 | 10 | 9 | USB_VIN | ||||||
| SWO | G11 | 8 | 7 | GND | |||||
| RESET# (I - Open Drain) | 6 | 5 | USB_D- | ||||||
| 3.3V_EN | 4 | 3 | USB_D+ | ||||||
| 3.3V | 2 | 1 | GND | ||||||
| Signal Group | Signal | I/O | Description | Voltage | Power | 3.3V | I | 3.3V Source | 3.3V |
|---|---|---|---|---|
| GND | Return current path | 0V | ||
| USB_VIN | I |
USB VIN compliant to USB 2.0 specification. Connect to pins on Processor Board that require 5V for USB functionality. |
4.8-5.2V | |
| RTC_3V_BATT | I |
3V provided by external coin cell or mini battery. Max draw = 100μA. Connect to pins maintaining an RTC during power loss. Can be left NC. |
3V | |
| 3.3V_EN | O | Controls the carrier board's main voltage regulator. Voltage above 1V will enable 3.3V power path. | 3.3V | |
| BATT_VIN/3 | I |
Carrier board raw voltage over 3. 1/3 resistor divider is implemented on carrier board. Amplify the analog signal as needed for full 0-3.3V range |
3.3V | |
| Reset | Reset | I | Input to processor. Open drain with pullup on processor board. Pulling low resets processor. | 3.3V |
| Boot | I | Input to processor. Open drain with pullup on processor board. Pulling low puts processor into special boot mode. Can be left NC. | 3.3V | |
| USB | USB_D± | I/O | USB Data ±. Differential serial data interface compliant to USB 2.0 specification. If UART is required for programming, USB± must be routed to a USB-to-serial conversion IC on the processor board. | |
| USB Host | USBHOST_D± | I/O | For processors that support USB Host Mode. USB Data±. Differential serial data interface compliant to USB 2.0 specification. Can be left NC. | |
| CAN | CAN_RX | I | CAN Bus receive data. | 3.3V |
| CAN_TX | O | CAN Bus transmit data. | 3.3V | |
| UART | UART_RX1 | I | UART receive data. | 3.3V |
| UART_TX1 | O | UART transmit data. | 3.3V | |
| UART_RTS1 | O | UART request to send. | 3.3V | |
| UART_CTS1 | I | UART clear to send. | 3.3V | |
| UART_RX2 | I | 2nd UART receive data. | 3.3V | |
| UART_TX2 | O | 2nd UART transmit data. | 3.3V | |
| I2C | I2C_SCL | I/O | I2C clock. Open drain with pullup on carrier board. | 3.3V |
| I2C_SDA | I/O | I2C data. Open drain with pullup on carrier board | 3.3V | |
| I2C_INT# | I | Interrupt notification from carrier board to processor. Open drain with pullup on carrier board. Active LOW | 3.3V | |
| I2C_SCL1 | I/O | 2nd I2C clock. Open drain with pullup on carrier board. | 3.3V | |
| I2C_SDA1 | I/O | 2nd I2C data. Open drain with pullup on carrier board. | 3.3V | |
| SPI | SPI_COPI | O | SPI Controller Output/Peripheral Input. | 3.3V |
| SPI_CIPO | I | SPI Controller Input/Peripheral Output. | 3.3V | |
| SPI_SCK | O | SPI Clock. | 3.3V | |
| SPI_CS# | O | SPI Chip Select. Active LOW. Can be routed to GPIO if hardware CS is unused. | 3.3V | |
| SPI/SDIO | SPI_SCK1/SDIO_CLK | O | 2nd SPI Clock. Secondary use is SDIO Clock. | 3.3V |
| SPI_COPI1/SDIO_CMD | I/O | 2nd SPI Controller Output/Peripheral Input. Secondary use is SDIO command interface. | 3.3V | |
| SPI_CIPO1/SDIO_DATA0 | I/O | 2nd SPI Peripheral Input/Controller Output. Secondary use is SDIO data exchange bit 0. | 3.3V | |
| SDIO_DATA1 | I/O | SDIO data exchange bit 1. | 3.3V | |
| SDIO_DATA2 | I/O | SDIO data exchange bit 2. | 3.3V | |
| SPI_CS1/SDIO_DATA3 | I/O | 2nd SPI Chip Select. Secondary use is SDIO data exchange bit 3. | 3.3V | |
| Audio | AUD_MCLK | O | Audio master clock. | 3.3V |
| AUD_OUT/PCM_OUT/I2S_OUT/CAM_MCLK | O | Audio data output. PCM synchronous data output. I2S serial data out. Camera master clock. | 3.3V | |
| AUD_IN/PCM_IN/I2S_IN/CAM_PCLK | I | Audio data input. PCM syncrhonous data input. I2S serial data in. Camera periphperal clock. | 3.3V | |
| AUD_LRCLK/PCM_SYNC/I2S_WS/PDM_DATA | I/O | Audio left/right clock. PCM syncrhonous data SYNC. I2S word select. PDM data. | 3.3V | |
| AUD_BCLK/PCM_CLK/I2S_CLK/PDM_CLK | O | Audio bit clock. PCM clock. I2S continuous serial clock. PDM clock. | 3.3V | |
| SWD | SWDIO | I/O | Serial Wire Debug I/O. Connect if processor board supports SWD. Can be left NC. | 3.3V |
| SWDCK | I | Serial Wire Debug clock. Connect if processor board supports SWD. Can be left NC. | 3.3V | |
| ADC | A0 | I | Analog to digital converter 0. Amplify the analog signal as needed to enable full 0-3.3V range. | 3.3V |
| A1 | I | Analog to digital converter 1. Amplify the analog signal as needed to enable full 0-3.3V range. | 3.3V | |
| PWM | PWM0 | O | Pulse width modulated output 0. | 3.3V |
| PWM1 | O | Pulse width modulated output 1. | 3.3V | |
| Digital | D0 | I/O | General digital input/output pin. | 3.3V |
| D1/CAM_TRIG | I/O | General digital input/output pin. Camera trigger. | 3.3V | |
| General/Bus | G0/BUS0 | I/O | General purpose pins. Any unused processor pins should be assigned to Gx with ADC + PWM capable pins given priority (0, 1, 2, etc.) positions. The intent is to guarantee PWM, ADC and Digital Pin functionality on respective ADC/PWM/Digital pins. Gx pins do not guarantee ADC/PWM function. Alternative use is pins can support a fast read/write 8-bit or 4-bit wide bus. | 3.3V |
| G1/BUS1 | I/O | 3.3V | ||
| G2/BUS2 | I/O | 3.3V | ||
| G3/BUS3 | I/O | 3.3V | ||
| G4/BUS4 | I/O | 3.3V | ||
| G5/BUS5 | I/O | 3.3V | ||
| G6/BUS6 | I/O | 3.3V | ||
| G7/BUS7 | I/O | 3.3V | ||
| G8 | I/O | General purpose pin | 3.3V | |
| G9/ADC_D-/CAM_HSYNC | I/O | Differential ADC input if available. Camera horizontal sync. | 3.3V | |
| G10/ADC_D+/CAM_VSYNC | I/O | Differential ADC input if available. Camera vertical sync. | 3.3V | |
| G11/SWO | I/O | General purpose pin. Serial Wire Output | 3.3V |
| M.2 Connector Pin# | MicroMod Pin Name | Board Connection | Description |
|---|---|---|---|
| 1 | GND | GND | Ground plane. |
| 2 | 3.3V | 3.3V | Regulated 3.3V via USB-C. |
| 3 | USB_D+ | -- | USB D+ connection for Processor Board. |
| 4 | 3.3V_EN | -- | Voltage regulator enable input. |
| 5 | USB_D- | -- | USB D- connection for Processor Board. |
| 6 | RESET | RESET Button | Connected to RESET Button. Reset is active LOW |
| 9 | USB_VIN | -- | Input voltage from USB. |
| 10 | D0 | D0 | Digital I/O pin |
| 11 | BOOT | BOOT Button | Connected to BOOT Button. Boot is active LOW. |
| 12 | I2C_SDA | Qwiic Connector - SDA | I2C data signal for Qwiic devices. |
| 14 | I2C_SCL | Qwiic Connector - SCL | I2C clock signal for Qwiic devices. |
| 16 | I2C_INT | INT | I2C interrupt pin |
| 18 | D1 | D1 | Digital I/O pin |
| 55 | SPI_CS | CS | Chip Select. |
| 57 | SPI_SCK | SCK | SPI Clock signal. |
| 59 | SPI_COPI | COPI | SPI Controller Out/Peripheral In signal. |
| 61 | SPI_CIPO | CIPO | SPI Controller In/Peripheral Out signal. |
Breakout Pins
The Qwiic Carrier Board features a 3.3V, a ground, seven I/O breakout pins. The functionality of these pins are detailed in the table above.
Breakout pins on the MicroMod Qwiic Carrier Board. (Click to enlarge)