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This version (21 Mar 2023 01:16) was approved by Richmond Eustacio.

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

Evaluation Kit Contents:

Adapter Board Hardware

Figure 2. Hardware Parts

Power Configuration

The circuit is powered by the voltage coming from the Maxim Feather headers. 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 (5V)
P5 SPI PMOD Voltage Selector 3V3 VBUS (5V)

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

FTHR-PMD-INTZ Design & Integration Files

  • Schematics
  • PCB Layout
  • Bill of Materials
  • Allegro Project

Additional Information and Useful Links

Reference Demos & Software

resources/eval/user-guides/circuits-from-the-lab/fthr-pmd-intz.txt · Last modified: 16 Mar 2023 06:50 by Trisha Cabildo