gen4-MOTG-AC1
End-of-Life Notice
This product has reached End-of-Life. For anyone who are still interested in this product or a similar configuration, please contact our sales team.
Description
The gen4-MOTG-AC1 Interface Board allows easy interface of a MOTG module to DIABLO-16-based gen4 display modules. The board carries one UMI-compatible MOTG slot which acts as an extension to the display module providing a plug-and-play interface with MOTG.
The interface board is designed to sit flush on the back of the DIABLO-16 2.4" to 3.5" display modules enabling sleek and compact designs.
It also features a 30-pin ZIF socket, for easy connection to application boards for further functionality advancement.
Hardware Overview
Pin Description
| Pin | Symbol | Description |
|---|---|---|
| 1 | 3.3V | 3.3V Input Supply |
| 2 | GND | Supply Ground |
| 3 | TX | Asynchronous Serial Receive Pin connected to PA3 of gen4 Display Module |
| 4 | RX | Asynchronous Serial Transmit Pin connected to PA2 of the gen4 Display Module |
| 5 | GPIO5 | General Purpose Input Output Pin connected to PA6 of the Display. |
| 6 | GPIO4 | General Purpose Input Output Pin connected to PA5 of the Display. |
| 7 | GPIO3 | General Purpose Input Output Pin connected to PA4 of the Display. |
| 8 | GPIO2 | General Purpose Input Output Pin connected to PA1 of the Display. |
| 9 | GPIO1 | General Purpose Input Output Pin connected to PA0 of the Display. |
| 10 | SCL | I2C Clock Pin connected to PA9 of the gen4 Display Module |
| 11 | SDA | I2C Data Pin connected to PA10 of the gen4 Display Module |
| 12 | SCK | SPI Clock Pin connected to PA13 of the Display(see NOTE) |
| 13 | MISO | SPI Master In Slave Out Pin connected to PA11 of the Display |
| 14 | MOSI | SPI Master Out Slave In Pin connected to PA12 of the Display (see NOTE) |
| 15 | GND | Supply Ground |
| 16 | 5.0V | 5V Input Supply |
Note
Due to limitations with GPIO pins PA12 and PA13 on DIABLO modules, these pins are used for I2C by the DIABLO modules themselves. This makes PA12 and PA13 not available to the SPI bus on MOTG, meaning all SPI MOTG modules are not compatible with DIABLO-16 based modules which feature external touch controllers.
This includes all DIABLO modules with Capacitive Touch (CTP) - All sizes, and Resistive Touch modules on 4.3" and above.
SPI MOTG modules are however compatible with Resistive Touch modules 2.4" to 3.5" as these do not feature an external RTP controller.
Applies to gen4 2.4" to 3.5" with board revisions 1.2 and lower, and gen4 4.3" to 7.0" with board revisions 1.5 and lower.
Warning
Please note there is an error on the PCB for REV 1.1 hardware, where the 5V and GND pads in the lower right corner of the board, the GND is not actually connected to GND. This will mean connecting wires to 5V and GND will not power the AC1 board or the display up. A simple work around is to instead solder your GND wire to the side of the 30-way FFC connector, just to the left of the CE logo instead, and use that in place of the GND pad. This has been corrected for REV 1.2 hardware.
Accessing MOTG Pins
UMI and gen4-PA/4D-UPA
| Pin | UMI | gen4-PA/4D-UPA |
|---|---|---|
| 1 | 3.3V | NA |
| 2 | GND | GND |
| 3 | TX | GPIO1 (PA3) |
| 4 | RX | GPIO2 (PA2) |
| 5 | GPIO5 | GPIO8 (PA6) |
| 6 | GPIO4 | GPIO9 (PA5) |
| 7 | GPIO3 | GPIO10 (PA4) |
| 8 | GPIO2 | GPIO3 (PA1) |
| 9 | GPIO1 | GPIO4 (PA0) |
| 10 | SCL | GPIO5 (PA9) |
| 11 | SDA | GPIO11 (PA10) |
| 12 | SCK | GPIO14 (PA13) |
| 13 | MISO | GPIO12 (PA11) |
| 14 | MOSI | GPIO13 (PA12) |
| 15 | GND | GND |
| 16 | 5.0V | +5V |
Mechanical Views
Schematic Details
Revision History
Hardware Revision
| Revision Number | Date | Description |
|---|---|---|
| 1.1 | 16/11/2016 | Initial Public Release version |
| 1.2 | 30/03/2017 | Fixed GND pad on 5V/GND power input, not being connected to GND |
Datasheet Revision
| Revision Number | Date | Description |
|---|---|---|
| 1.8 | 06/01/2023 | Modified datasheet for web-based documentation |