SparkFun MicroMod Input and Display Carrier Board Hookup Guide

Contributors: Alex the Giant, Ell C

Hardware Overview

In this section we'll cover the various hardware and sensors included on the MicroMod Input & Display Carrier Board.

Common Components

Most SparkFun MicroMod Carriers will have some common components and all MicroMod Carriers will have the keyed M.2 MicroMod Connector to plug your processor into. The photo and list below outline some of the components you can expect on most SparkFun MicroMod Carriers.

• M.2 MicroMod Connector - This special keyed M.2 connector lets you install your MicroMod Processor of choice on your Input & Display Carrier Board.
• USB-C Connector - Connect to your computer to program your Processor and also can provide power to your MicroMod system.
• 3.3V Regulator - Provides a regulated 3.3V and sources up to 1A.
• Qwiic Connector - The standard Qwiic connector so you can add other Qwiic devices to your MicroMod system.
• Boot/Reset Buttons - Push buttons to enter Boot Mode on Processor boards and to Reset your MicroMod circuit. More information needed - LAC
• microSD Slot - Insert a microSD card for reading and writing data.

Power

The Input and Display Carrier Board takes an input voltage range from 2.7V - 6V via the USB-C connector. We've incorporated a power regulation circuit that caps the voltage for power sensitive circuits and the Qwiic connector.

Input & Display Carrier Board Specific Components

ATTiny84

We've populated this carrier board with Atmel's ATtiny84 with 8kB of programmable flash. This little guy is preprogrammed to communicate with the processor over I²C to read button presses.

TFT Display

4DLCD's 24320240-IPS is a color active matrix LCD module incorporating amorphous silicon TFT (Thin Film Transistor). The module display area measures 2.4" and contains 240 x 320 pixels.

LEDs

The Input and Display Carrier Board has 6 Addressable APA102 LEDs.

Input Buttons

Button button, who's got the button? We do! We have two input buttons (A and B), and a 5 way switch that allows you to navigate a UI or play an onboard game.

JTAG Debugging

We've populated the JTAG footprint for more advanced users who need breakpoint level debugging. We recommend checking out our JTAG section for the compatible JTAG programmer and debugger.

Jumpers

I²C Jumper

If you are daisy-chaining multiple Qwiic devices, you will want to cut this jumper; if multiple sensors are connected to the bus with the pull-up resistors enabled, the parallel equivalent resistance could create too strong of a pull-up for the bus to operate correctly. As a general rule of thumb, disable all but one pair of pull-up resistors if multiple devices are connected to the bus. To disable the pull up resistors, use an X-acto knife to cut the joint between the two jumper pads highlighted below.

PWR Jumper

Cutting this jumper will disable the "Power" LED on the front of the board.

3V3CTRL Jumper

Many of the MicroMod carrier boards have an RTC backup battery on board and as part of the standardized voltage regulation circuit we include a 3V3 jumper that, when closed, allows you to control the 3V3 control regulator. This shuts down everything on the 3V3 rail but the battery keeps the processor awake. The Input and Display Carrier Board does not have a backup battery, so this jumper should remain open.

BYP Jumper

If you really, really, REALLY need more power, closing this jumper will bypass the 2A fuse. Close at your own risk!

Measure Jumper

Want to measure the juice running through your circuits? Cut the trace between these PTH pads in order to measure the current with a Digital MultiMeter.

PinOuts

• Input & Display Carrier Board Pinout Table
• MicroMod General Pinout Table
• MicroMod General Pin Descriptions

Board Dimensions

The Input and Display Carrier Board measures 3.25 inches by 2.25 inches.