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This version (08 Feb 2022 09:46) was approved by Allan Uy.

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:


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 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 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


Registration

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End of document

resources/eval/user-guides/circuits-from-the-lab/pmd-rpi-intz.txt · Last modified: 08 Feb 2022 09:43 by Allan Uy