This article lists down the differences between various versions of Viola Carrier Boards (i.e. Viola V1.1, Viola V1.2 and Viola Plus V1.2).
NA - Not available
✓ - Assembled
✖ - Not Assembled
| Details | Viola V1.1 | Viola V1.2 | Viola V1.2 Plus | Remarks |
| Ethernet (X5) | ✓ | ✓ | ✓ | On Viola V1.2 PCB, the issue with respect to the ETH_TX0_P/N signals connections has been fixed. |
| USB Host (X6, Dual Stacked Type-A) | ✓ | ✓ | ✓ | |
| USB Client (X4, Micro-AB Type) | ✖ | ✖ | ✓ | Shared with USB Host (X4, Bottom) |
| Micro SD (X8) | ✓ | ✓ | ✓ | |
| Unified Interface Display (X7) | ✓ | ✓ | ✓ | |
| Extension Connector (X9) | ✓ | ✖ | ✓ | Pinout is compatible across versions. |
| Audio Connector (X10) | NA | ✖ | ✓ | On Viola V1.2 PCB, Audio connector has been added. Please note that, this is a module specific feature and may not be supported by all the computer-on-modules in the Colibri family. For more details, refer to the datasheet of the Colibri computer-on-modules. |
| Colibri VFxx Tamper Connector (X11) | NA | ✖ | ✖ | Available on the bottom side of the Viola V1.2 PCB. |
| Terminal Block Power Supply Connector (X3) | ✓ | ✓ | ✓ | On Viola V1.2 PCB, the connector has been moved out (about 2 mm) from the board edge similar to the Ethernet and USB Host connectors. |
| Barrel Power Supply Connector (X2) | ✖ | ✖ | ✓ | On Viola V1.2 PCB, the connector has been moved out (about 2 mm) from the board edge similar to the Ethernet and USB Host connectors. |
| Battery Holder (BAT1) | ✖ | ✓ | ✓ | Can be used to provide backup power to internal or external RTC based on the PCB assembly. |
| External RTC | ✖ | ✖ | ✓ | On Viola V1.2 PCB, RTC power circuit has been modified. |
| Parallel Camera Interface Signals | NA | ✖ | ✓ | Parallel Camera Interface (CIF) signals are available on the connectors X9 and X10. Please note that, this is a module specific feature and may not be supported by all the computer-on-modules in the Colibri family. For more details, refer to the datasheet of the Colibri computer-on-modules. |
| Power Supply (on board DC/DC Synchronous Step-down Converter) | AP6502, Rated 2A (max) |
AP6503, Rated 3A (max) |
AP6503, Rated 3A (max) |
|
| LED Indication | 5V power | 3.3V power | 3.3V power |
NOTE: _For more details about any specific version of the Viola Carrier Board, please refer to the respective datasheet and schematics.
