This version (14 Mar 2023 07:07) was approved by Joyce Velasco.The Previously approved version (08 Feb 2022 09:43) is available.
Table of Contents
PMD-RPI-INTZ Hardware User Guide
Overview
The PMD-RPI-INTZ is an add-on adapter board for the Raspberry Pi that allows interfacing with up to 4 Pmod boards (2 SPI devices, 2 I2C devices), 1 QuikEval™ demonstration board and 1 DC1613A-compatible demonstration board.
The PMD-RPI-INTZ follows the standard Raspberry Pi HAT mechanical specifications, minus the cutouts for the camera and display flexis. An ID EEPROM is also included on the board to allow auto-configuration.
Evaluation Kit Contents:
- PMD-RPI-INTZ Adapter Board (Buy)
Adapter Board Hardware
There is no level translation provided on the PMD-RPI-INTZ. Only connect devices that operate with 3.3V logic levels. Do not apply higher logic levels on the IO pins to avoid damaging the Raspberry Pi.
SPI Pmod Connectors (P1 and P2)
Pmod devices that use the SPI interface should be connected to either of the two 2×6 female headers located on the left-hand side of the PMD-RPI-INTZ. Each header pin is connected to a Raspberry Pi GPIO pin through the 40 pin connector (P9).
The table below lists the default Raspberry Pi GPIO pin assignments for the P1 pins and their corresponding functions.
| SPI Pmod Connector #1 (P1) Pinout | ||
|---|---|---|
| Pin Number | Default Raspberry Pi Pin Assignment | Pin Function on the PMD-RPI-INTZ |
| 1 | Pin 24 (GPIO8)¹ | SPI Pmod #1 CS1. SPI Chip Select #1 from the Raspberry Pi to the Pmod device. |
| 2 | Pin 19 (SPI0 MOSI)² | MOSI. SPI Data from the Raspberry Pi to the Pmod device. |
| 3 | Pin 21 (SPI0 MISO)² | MISO. SPI Data from the Pmod device to the Raspberry Pi. |
| 4 | Pin 23 (SPI0 SCLK)² | SCLK. SPI Clock from the Raspberry Pi to the Pmod device. |
| 5 | GND | Ground |
| 6 | 3V3 Power | SPI Pmod #1 VCC. Connected to the 3.3V Regulator Output of the Raspberry Pi. |
| 7 | Pin 35 (GPIO19) | SPI Pmod #1 INT. Interrupt Signal from the Pmod device to the Raspberry Pi. |
| 8 | Pin 40 (GPIO21) | SPI Pmod #1 RESET. Reset Signal from the Raspberry Pi to the Pmod device. |
| 9 | Pin 38 (GPIO20) | SPI Pmod #1 CS2. SPI Chip Select #2 from the Raspberry Pi to the Pmod device. |
| 10 | Pin 12 (GPIO18) | SPI Pmod #1 CS3. SPI Chip Select #3 from the Raspberry Pi to the Pmod device. |
| 11 | GND | Ground |
| 12 | 3V3 Power | SPI Pmod #1 VCC. Connected to the 3.3V Regulator Output of the Raspberry Pi. |
¹IO pin shared with the QuikEval™ Demo Board Connector (P5).
²IO pins shared with the SPI Pmod Connector #2 (P2) and the QuikEval™ Demo Board Connector (P5).
Similarly, the table below lists the default Raspberry Pi GPIO pin assignments for the P2 pins and their corresponding functions.
| SPI Pmod Connector #2 (P2) Pinout | ||
|---|---|---|
| Pin Number | Default Raspberry Pi Pin Assignment | Pin Function on the PMD-RPI-INTZ |
| 1 | Pin 26 (GPIO7) | SPI Pmod #2 CS1. SPI Chip Select #1 from the Raspberry Pi to the Pmod device. |
| 2 | Pin 19 (SPI0 MOSI)¹ | MOSI. SPI Data from the Raspberry Pi to the Pmod device. |
| 3 | Pin 21 (SPI0 MISO)¹ | MISO. SPI Data from the Pmod device to the Raspberry Pi. |
| 4 | Pin 23 (SPI0 SCLK)¹ | SCLK. SPI Clock from the Raspberry Pi to the Pmod device. |
| 5 | GND | Ground |
| 6 | 3V3 Power | SPI Pmod #2 VCC. Connected to the 3.3V Regulator Output of the Raspberry Pi. |
| 7 | Pin 22 (GPIO25) | SPI Pmod #2 INT. Interrupt Signal from the Pmod device to the Raspberry Pi. |
| 8 | Pin 32 (GPIO12) | SPI Pmod #2 RESET. Reset Signal from the Raspberry Pi to the Pmod device. |
| 9 | Pin 29 (GPIO5) | SPI Pmod #2 CS2. SPI Chip Select #2 from the Raspberry Pi to the Pmod device. |
| 10 | Pin 31 (GPIO6) | SPI Pmod #2 CS3. SPI Chip Select #3 from the Raspberry Pi to the Pmod device. |
| 11 | GND | Ground |
| 12 | 3V3 Power | SPI Pmod #2 VCC. Connected to the 3.3V Regulator Output of the Raspberry Pi. |
¹IO pins shared with the SPI Pmod Connector #1 (P1) and the QuikEval™ Demo Board Connector (P5).
I²C Pmod Connectors (P3 and P4)
Pmod devices that use the I²C interface should be connected to either of the two 2×6 female headers located on the lower side of the PMD-RPI-INTZ. Each header pin is connected to a Raspberry Pi GPIO pin through the 40 pin connector (P9).
The table below lists the default Raspberry Pi GPIO pin assignments for the P3 pins and their corresponding functions.
| I²C Pmod Connector #1 (P3) Pinout | ||
|---|---|---|
| Pin Numbers | Default Raspberry Pi Pin Assignment | Pin Function on the PMD-RPI-INTZ |
| 1 & 7 | Pin 37 (GPIO26) | I²C Pmod #1 INT. Interrupt Signal from the Pmod device to the Raspberry Pi. |
| 2 & 8 | Pin 33 (GPIO13) | I²C Pmod #1 RESET. Reset Signal from the Raspberry Pi to the Pmod device. |
| 3 & 9 | Pin 5 (I²C SCL)¹ | SCL. I²C Clock from the Raspberry Pi to the Pmod device. |
| 4 & 10 | Pin 3 (I²C SDA)¹ | SDA. I²C Data from the Raspberry Pi to the Pmod device. |
| 5 & 11 | GND | Ground |
| 6 & 12 | 3V3 Power | I²C Pmod #1 VCC. Connected to the 3.3V Regulator Output of the Raspberry Pi. |
¹IO pins shared with the I2C Pmod Connector #2 (P4), the QuikEval™ Demo Board Connector (P5) and the DC1613A-Compatible Demo Board Connector (P6).
Similarly, the table below lists the default Raspberry Pi GPIO pin assignments for the P4 pins and their corresponding functions.
| I²C Pmod Connector #2 (P4) Pinout | ||
|---|---|---|
| Pin Numbers | Default Raspberry Pi Pin Assignment | Pin Function on the PMD-RPI-INTZ |
| 1 & 7 | Pin 13 (GPIO27) | I²C Pmod #2 INT. Interrupt Signal from the Pmod device to the Raspberry Pi. |
| 2 & 8 | Pin 11 (GPIO17) | I²C Pmod #2 RESET. Reset Signal from the Raspberry Pi to the Pmod device. |
| 3 & 9 | Pin 5 (I²C SCL)¹ | SCL. I²C Clock from the Raspberry Pi to the Pmod device. |
| 4 & 10 | Pin 3 (I²C SDA)¹ | SDA. I²C Data from the Raspberry Pi to the Pmod device. |
| 5 & 11 | GND | Ground |
| 6 & 12 | 3V3 Power | I²C Pmod #2 VCC. Connected to the 3.3V Regulator Output of the Raspberry Pi. |
¹IO pins shared with the I2C Pmod Connector #1 (P3), the QuikEval™ Demo Board Connector (P5) and the DC1613A-Compatible Demo Board Connector (P6).
Connecting Hardware Designed for Digilent I²C Pmod Interface Specification Ver. 1.0.0:
Version 1.0.0 of the Digilent Pmod Interface Specification required 2×4 headers to be used for I²C devices; Pmod boards that follow this old standard should be connected to either P3 or P4 as shown below:
QuikEval™ Demo Board Connector and SPI/I²C Switch (P5 and SW1)
QuikEval™ demonstration boards should be connected to the 14-pin shrouded header through a CA2440 ribbon cable (included with each demo board). Each header pin is connected to a Raspberry Pi GPIO pin through the 40 pin connector (P9).
The table below lists the default Raspberry Pi GPIO pin assignments for the P5 pins and their corresponding functions.
| QuikEval™ Demo Board Connector (P5) Pinout | ||
|---|---|---|
| Pin Number | Default Raspberry Pi Pin Assignment | Pin Function on the PMD-RPI-INTZ |
| 1 | 5V Power | QuikEval™ Demo Board Auxiliary Power. Normally connected to 5V but external power can be applied using JP1 and EXT_V+. |
| 2 | 3V3 Power | QuikEval™ Demo Board VCCIO. Connected to the 3.3V Regulator Output of the Raspberry Pi. |
| 3 | GND | Ground |
| 4 | Pin 23 (SPI0 SCLK)¹ or Pin 5 (I2C1 SCL)² | SCLK (SPI) or SCL (I²C). Select the appropriate clock pin for the demo board using SW1. |
| 5 | Pin 21 (SPI0 MISO)¹ | MISO. SPI Data from the Pmod device to the Raspberry Pi. |
| 6 | Pin 24 (GPIO8)¹ | QuikEval™ Demo Board CS. SPI Chip Select Signal from the Raspberry Pi to the demo board. |
| 7 | Pin 19 (SPI0 MOSI)¹ or Pin 3 (I2C1 SDA)² | MOSI (SPI) or SDA (I²C). Select the appropriate data pin for the demo board using SW1. |
| 8 | GND | Ground |
| 9 | Pin 3 (I2C1 SDA)² | QuikEval™ Demo Board EESDA. I²C Data exchanged between the Raspberry Pi and the demo board EEPROM. |
| 10 | 5V Power | QuikEval™ Demo Board EEVCC. Connected to the 5V Input Power of the Raspberry Pi. Used to supply power to the demo board EEPROM. |
| 11 | Pin 5 (I2C1 SCL)² | QuikEval™ Demo Board EESCL. I²C Clock from the Raspberry Pi to the demo board EEPROM. |
| 12 | GND | Ground |
| 13 | GND | Ground |
| 14 | Pin 15 (GPIO22) | QuikEval™ Demo Board GPIO. Actual function depends on the demo board. |
¹IO pins shared with the SPI Pmod Connector #1 (P1) and the SPI Pmod Connector #2 (P2).
²IO pins shared with the I2C Pmod Connector #1 (P3), the I2C Pmod Connector #2 (P4) and the DC1613A-Compatible Demo Board Connector (P6).
QuikEval™ demonstration boards will use either the SPI or the I²C interface, depending on the model. Change the setting of the slide switch SW1 accordingly.
Some QuikEval™ demonstration boards have the option of being powered via an auxiliary power pin (Pin 1 of P6). To accomplish this with the PMD-RPI-INTZ, connect an external power supply to EXT_V+ and change the setting of the solder jumper JP1.
| JP1 Setting | EXT_V+ Configuration |
|---|---|
| Open (Default) | Tied to +5 V power supply of the Raspberry Pi |
| Shorted | Can use an external power supply via the EXT_V+ test point |
DC1613A-Compatible Demo Board Connector (P6)
DC1613A-Compatible demonstration boards should be connected to the 12-pin shrouded header above P4. Each header pin is connected to a Raspberry Pi GPIO pin through the 40 pin connector (P9).
The table below lists the default Raspberry Pi GPIO pin assignments for the P6 pins and their corresponding functions.
| DC1613A-Compatible Demo Board Connector (P6) Pinout | ||
|---|---|---|
| Pin Number | Default Raspberry Pi Pin Assignment | Pin Function on the PMD-RPI-INTZ |
| 1 | 5V Power | DC1613A-Compatible Demo Board AUXP. Connected to the 5V Input Power of the Raspberry Pi. Used to supply power to the demo board EEPROM. |
| 2 | Pin 3 (I²C1 SDA)¹ | SDA. PMBus Data from the Raspberry Pi to the demo board. Connected to I²C1 SDA. |
| 3 | GND | Ground |
| 4 | Pin 5 (I²C1 SCL)¹ | SCL. PMBus Clock from the Raspberry Pi to the demo board. Connected to I²C1 SCL. |
| 5 | 3V3 Power | DC1613A-Compatible Demo Board LGKPWR. Connected to the 3.3V Regulator Output of the Raspberry Pi. |
| 6 | Pin 7 (GPIO4) | ALERTB. PMBus/SMBus Interrupt Signal from the demo board to the Raspberry Pi. |
| 7 | Pin 16 (GPIO23)² | DC1613A-Compatible Demo Board GPIO_1. Actual function depends on the demo board. |
| 8 | Pin 18 (GPIO24)² | DC1613A-Compatible Demo Board GPIO_2. Actual function depends on the demo board. |
| 9 | Pin 36 (GPIO16)² | DC1613A-Compatible Demo Board OUTEN. Enable Signal from the Raspberry Pi to the demo board. |
| 10 | GND | Ground |
| 11 | Pin 5 (I²C1 SCL)¹ | DC1613A-Compatible Demo Board AUXEESCL. I²C Clock from the Raspberry Pi to the demo board EEPROM. |
| 12 | Pin 3 (I²C1 SDA)¹ | DC1613A-Compatible Demo Board AUXSDA. I²C Data exchanged between the Raspberry Pi and the demo board EEPROM. |
¹IO pins shared with the I2C Pmod Connector #1 (P3), the I2C Pmod Connector #2 (P4) and the QuikEval™ Demo Board Connector (P5).
²IO pins normally disconnected from the Raspberry Pi. Short the appropriate solder pads between P10 and P11 to enable these pins.
Changing the Raspberry Pi GPIO Assignments
The PMD-RPI-INTZ maps the GPIO pins of the Raspberry Pi as shown in the table below. For easy access to these signals, the evaluation board uses a stacking header for the Raspberry Pi connector.
| Raspberry Pi Connector (P9) Pinout | |||||
|---|---|---|---|---|---|
| Pin Function on the PMD-RPI-INTZ | GPIO Pin | Pin Number | GPIO Pin | Pin Function on the PMD-RPI-INTZ | |
| 3.3V Power | 3V3 Power | 1 | 2 | 5V Power | 5V Power |
| I²C SDA | GPIO 2 | 3 | 4 | 5V Power | 5V Power |
| I²C SCL | GPIO 3 | 5 | 6 | Ground | Ground |
| PMBus/SMBus ALERTB | GPIO 4 | 7 | 8 | GPIO 14 | No connection |
| Ground | Ground | 9 | 10 | GPIO 15 | No connection |
| I²C Pmod #2 RESET | GPIO 17 | 11 | 12 | GPIO 18 | SPI Pmod #1 CS3 |
| I²C Pmod #2 INT | GPIO 27 | 13 | 14 | Ground | Ground |
| QuikEval™ Demo Board GPIO | GPIO 22 | 15 | 16 | GPIO 23 | DC1613A-Compatible Demo Board GPIO_1 |
| 3.3V Supply Voltage | 3V3 Power | 17 | 18 | GPIO 23 | DC1613A-Compatible Demo Board GPIO_2 |
| SPI MOSI | GPIO 10 | 19 | 20 | Ground | Ground |
| SPI MISO | GPIO 9 | 21 | 22 | GPIO 25 | SPI Pmod #2 INT |
| SPI SCLK | GPIO 11 | 23 | 24 | GPIO 8 | SPI Pmod #1 CS1 & QuikEval™ Demo Board CS |
| Ground | Ground | 25 | 26 | GPIO 8 | SPI Pmod #2 CS1 |
| ID EEPROM SDA | GPIO 0 | 27 | 28 | GPIO 1 | ID EEPROM SCL |
| SPI Pmod #2 CS2 | GPIO 5 | 29 | 30 | Ground | Ground |
| SPI Pmod #2 CS3 | GPIO 6 | 31 | 32 | GPIO 12 | SPI Pmod #2 RESET |
| I²C Pmod #1 RESET | GPIO 13 | 33 | 34 | Ground | Ground |
| SPI Pmod #1 INT | GPIO 19 | 35 | 36 | GPIO 16 | DC1613A-Compatible Demo Board OUTEN |
| I²C Pmod #1 INT | GPIO 26 | 37 | 38 | GPIO 20 | SPI Pmod #1 CS2 |
| Ground | Ground | 39 | 40 | GPIO 21 | SPI Pmod #1 RESET |
The adapter board is designed so that most of these IO signals pass through the rows of test points and solder jumpers at the center. This way, if a different set of GPIO pin assignments is needed (or desired), the default connections can be changed by simply removing the appropriate solder jumper(s) and then placing a wire between the test points of interest.
Refer to below pictures and tables for the signal names available on each test point. Raspberry Pi GPIO pins are connected to P8 and P10; PMD-RPI-INTZ Pmod and demo board pins are connected to P7 and P11.
| P8 Pin Number | Raspberry Pi GPIO | Jumper | PMD-RPI-INTZ Signal | P7 Pin Number |
|---|---|---|---|---|
| 1 | GPIO 4 | JP2 | PMBus/SMBus ALERTB | 1 |
| 2 | GPIO 17 | JP3 | I²C Pmod #2 RESET | 2 |
| 3 | GPIO 27 | JP4 | I²C Pmod #2 INT | 3 |
| 4 | GPIO 22 | JP5 | QuikEval™ Demo Board GPIO | 4 |
| 5 | GPIO 10 | JP6 | SPI MOSI | 5 |
| 6 | GPIO 9 | JP7 | SPI MISO | 6 |
| 7 | GPIO 11 | JP8 | SPI SCLK | 7 |
| 8 | GPIO 5 | JP9 | SPI Pmod #2 CS2 | 8 |
| 9 | GPIO 6 | JP10 | SPI Pmod #2 CS3 | 9 |
| 10 | GPIO 13 | JP11 | I²C Pmod #1 RESET | 10 |
| 11 | GPIO 19 | JP12 | SPI Pmod #1 INT | 11 |
| 12 | GPIO 26 | JP13 | I²C Pmod #1 INT | 12 |
| P10 Pin Number | Raspberry Pi GPIO | Jumper | PMD-RPI-INTZ Signal | P11 Pin Number |
|---|---|---|---|---|
| 1 | GPIO 14 | JP14 | No connection | 1 |
| 2 | GPIO 15 | JP15 | No connection | 2 |
| 3 | GPIO 18 | JP16 | SPI Pmod #1 CS3 | 3 |
| 4 | GPIO 23 | JP17 | DC1613A-Compatible Demo Board GPIO_1 | 4 |
| 5 | GPIO 24 | JP18 | DC1613A-Compatible Demo Board GPIO_2 | 5 |
| 6 | GPIO 25 | JP19 | SPI Pmod #2 INT | 6 |
| 7 | GPIO 8 | JP20 | SPI Pmod #1 CS1 & QuikEval™ Demo Board CS | 7 |
| 8 | GPIO 7 | JP21 | SPI Pmod #2 CS1 | 8 |
| 9 | GPIO 12 | JP22 | SPI Pmod #2 RESET | 9 |
| 10 | GPIO 16 | JP23 | DC1613A-Compatible Demo Board OUTEN | 10 |
| 11 | GPIO 20 | JP24 | SPI Pmod #1 CS2 | 11 |
| 12 | GPIO 21 | JP25 | SPI Pmod #1 RESET | 12 |
Schematic, PCB Layout, Bill of Materials
PMD-RPI-INTZ Design & Integration Files
- Schematic
- PCB Layout
- Bill of Materials
- Allegro Project
Registration
Receive software update notifications, documentation updates, view the latest videos, and more when you register your hardware. Register to receive all these great benefits and more!
End of document
resources/eval/user-guides/circuits-from-the-lab/pmd-rpi-intz.txt · Last modified: 14 Mar 2023 07:07 by Joyce Velasco