FTHR-PMD-INTZ

Feather-to-PMOD Interposer Hardware User Guide

Overview

The FTHR-PMD-INTZ is an add-on adapter board especially built for the MAXIM MCU boards. Maxim Feather Boards, namely the MAX32630FTHR, MAX32650FTHR, MAX32655FTHR, MAX32666FTHR, and MAX78000FTHR, are very small form factors called “feathers”, and they require special connectors to be used with other Pmod boards.

This interposer board provides such solution and allows interfacing with up to two Pmod boards via SPI or I2C interface. Furthermore, this add-on adapter board adheres to the standards, such as the Digilent Pmod™ Interface Specification and Adafruit Feather Specification.

Figure 1 FTHR-PMD-INTZ

Important

Evaluation Kit Contents:

• FTHR-PMD-INTZ Adapter Board (Buy)

Adapter Board Hardware

Figure 2 Hardware Parts

Power Configuration

The circuit is powered by the voltage coming from the Maxim Featherheaders.

Figure 3 Power Jumpers

The table below lists the power configuration for this interposer board. The default voltage configuration for all is 3V3.

Part	Description	Left Connection	Right Connection
P2	Feather Voltage Selector	3V3	1V8
P4	I2C PMOD Voltage Selector	3V3	VBUS (5 V)
P5	SPI PMOD Voltage Selector	3V3	VBUS (5 V)

SPI Pmod Connector (P6)

Connect Pmod devices that use SPI interface to the left-hand side Pmod connector, as shown below.

Figure 4 SPI PMOD Connector

The table below lists the corresponding pin assignment.

SPI Pmod Connector (P6) Pinout
Pin Number	Pin Function on FTHR-PMD-INTZ	Pin Number	Pin Function on FTHR-PMD-INTZ
1	CS. SPI Chip select #1 from MAXFTHR to the Pmod device.	7	SPI_GPIO0. Interrupt Signal from the Pmod device to the MAXFTHR
2	MOSI_GPIO1. SPI data from MAXFTHR to the Pmod device.	8	SPI_GPIO1. Reset Signal from MAXFTHR to Pmod device
3	MISO. SPI data from MAXFTHR to the Pmod device.	9	SPI_GPIO2. SPI Chip select #2 from MAXFTHR to the Pmod device.
4	SCLK. SPI Clock from MAXFTHR to the Pmod device.	10	SPI_GPIO3. SPI Chip select #3 from MAXFTHR to the Pmod device.
5	GND. Ground	11	GND. Ground
6	VCC. Connected to 3V3 or VBUS from MAXFTHR (shorted in P5)	12	VCC. Connected to 3V3 or VBUS from MAXFTHR (shorted in P5)

I2C Pmod Connector (P7)

Pmod devices that use I2C interface should be connected to the right Pmod connector.

Figure 5 I2C PMOD Connector

The table below lists the corresponding pin assignment.

I2C Pmod Connector (P7) Pinout
Pin Number	Pin Function on FTHR-PMD-INTZ	Pin Number	Pin Function on FTHR-PMD-INTZ
1	I2C_GPIO0. Interrupt Signal from the Pmod device to the MAXFTHR.	7	I2C_GPIO0. Interrupt Signal from the Pmod device to the MAXFTHR.
2	I2C_GPIO1. Reset Signal from the MAXFTHR to the Pmod device.	8	I2C_GPIO1. Reset Signal from the MAXFTHR to the Pmod device.
3	SCL. I2C Clock from the MAXFTHR to the Pmod device.	9	SCL. I2C Clock from the MAXFTHR to the Pmod device.
4	SDA. I2C Data from the MAXFTHR to the Pmod device.	10	SDA. I2C Data from the MAXFTHR to the Pmod device.
5	GND. Ground	11	GND. Ground
6	VCC. Connected to 3V3 or VBUS from MAXFTHR (shorted in P4)	12	VCC. Connected to 3V3 or VBUS from MAXFTHR (shorted in P4)

Schematic, PCB Layout, Bill of Materials

Download

FTHR-PMD-INTZ Design & Integration Files

• Schematics

• PCB Layout

• Bill of Materials

• Allegro Project

• LTspice Simulation File

Additional Information and Useful Links

• FTHR-PMD-INTZ Product Page

• MAX32630FTHR Product Page

• MAX32650FTHR Product Page

• MAX32655FTHR Product Page

• MAX32666FTHR Product Page

• MAX78000FTHR Product Page

Reference Demos & Software

• EVAL-ADXL355-PMDZ User Guide

• EVAL-ADT7420-PMDZ Digital Temperature PMOD User Guide

• MAX31855PMB1 Thermocouple-to-Digital PMOD User Guide