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The XtremeOSD board has quite a number of pins that are grouped together in pairs called ports and majority of them reside on the edge of the board while a few are on top of the PCB. This chapter of the manual documents the particulars of each port header and what their purpose is by breaking down the ports down into dedicated sections.
| Pin # | Name | Description |
| 1 | + (Plus) | Power +6.5 volts minimum to +36.0 volts maximum. |
| 2 | – (Minus) | Power grounding connection. Reverse polarity protected. |
The video out and video in ports are apart of the same 22 pin header. The following table makes it clear as to which pins belong to which ports.
| Pin #s | Port | Description |
| 1 - 6 | Video Out | Video output signals. |
| 7 - 14 | Video In 0 | Video input signals for the main video overlay by default. |
| 15 - 22 | Video In 1 | Video input signals for the Picture-in-Picture overlay window by default. |
There are three video output signal pins and three corresponding ground pins that make up the video out port. They are capable of providing one to two Composite (CVBS) and one S-Video video out signals. There is a choice of one or two Composite signals out, or just one S-Video signal out. S-Video and Composite(s) are not both available at the same time even though physically the pins are there because the video signal encoder chip used does not support outputting S-Video and Composite at the same time.
| Pin # | Name | Description |
| 1 | CVBS | Composite only output pin when either single or dual-CVBS modes are used. |
| 3 | Y | Luminance signal only when S-Video mode is used. |
| 5 | C/CVBS | Chrominance signal when S-Video mode is used, else second composite output when dual-CVBS mode is used. |
| 2, 4, 6 | GND | Common grounding connection, intended for video signal connections. |
As explained in the top Video Out section that there are some video signal out combinations that are allowed and the table below shows as to which video out pins are used for particular video out modes.
| # | Mode Name | Pin Name | Pin Mode | Output Format | Description |
| 0 | 1x CVBS | CVBS | CVBS | Composite | Pin 1 outputs composite video signal and the other two video signal pins output nothing. |
| Y | Disabled | None | |||
| C/CVBS | Disabled | None | |||
| 1 | 2x CVBS | CVBS | CVBS | Composite | Both pins 1 and 5 output the same composite, duplicated, video signal, and pin 3 outputs nothing. |
| Y | Disabled | None | |||
| C/CVBS | CVBS | Composite | |||
| 2 | S-Video | CVBS | Disabled | None | Both pins 3 and 5 combined output the S-Video video signal, and pin 1 outputs nothing. |
| Y | Y | S-Video | |||
| C/CVBS | C |
See OSD User Configuration tool manual for information on setting the video output mode.
There are two video input ports that are identical in operation and configuration which are Video In 0 and Video In 1. The only difference between the two is Video In 0 is normally used for the background video overlay and Video In 1 is normally used for Picture-in-Picture overlay window. This is typical and default configuration for the two video input ports. Their roles can of course be swapped in the OSD User Configuration tool. Both video input ports are also individually configurable for their operation modes which determine each port's input pins are set for particular video signal types or formats.
Each video input port has four video input signal pins and four corresponding ground pins that make up the video in port. They are capable of providing one to four Composite (CVBS) inputs, up to two S-Video inputs with up to two Composite (CVBS) inputs, or one Composite (CVBS) input with one Component (YPbPr) input video signal pin sets at the same time. Note that however only one video pin set in a given video input port can be active at the same time because each video port goes to their own video decoder chip and the decoded video stream in turn goes to a dedicated video capture unit on the microcontroller. Effectively only two video signals total, one from each video input port, can be active at the same time where one is for the background video overlay and the other for Picture-in-Picture video overlay window.
The following table describes the purpose of each individual video input pin is for both video in ports. The pattern is describes a video pin for Video In 0 followed by a pin that has same purpose but for Video In 1 then another Video In 0 pin and on until the description for GND pins.
| Pin # | Port | Name | Description |
| 7 | Video In 0 | CVBS_0/Y/Y | Composite, Luminance for S-Video, or Luminance with Sync for Component video input signals. Mode 0 & 3 Composite input signal. Mode 1 & 2 Luminance for S-Video input signal. Mode 4 Luminance with Sync for Component video input signal. |
| 15 | Video In 1 | CVBS_1/Y/Y | |
| 9 | Video In 0 | CVBS_0/C/Pb | Composite, Chrominance for S-Video, or Blue differential for Component video input signals. Mode 0 & 3 Composite input signal. Mode 1 & 2 Chrominance for S-Video input signal. Mode 4 Blue differential for Component video input signal. |
| 17 | Video In 1 | CVBS_1/C/Pb | |
| 11 | Video In 0 | CVBS_0/Y/Pr | Composite, Luminance for S-Video, or Red differential for Component video input signals. Mode 0 & 2 Composite input signal. Mode 1 & 3 Luminance for S-Video input signal. Mode 4 Red differential for Component video input signal. |
| 19 | Video In 1 | CVBS_1/Y/Pr | |
| 13 | Video In 0 | CVBS_0/C | Composite and Chrominance for S-Video video input signals. Mode 0, 2 & 4 Composite input signal. Mode 1 & 3 Chrominance for S-Video input signal. |
| 21 | Video In 1 | CVBS_1/C | |
| 8, 10, 12, 14, 16, 18, 20, 22 | Video In 0 & 1 | GND | Common grounding connection, intended for video signal connections. |
As explained in the top Video In 0 & 1 section that there are some video signal input combinations that are allowed and the table below shows as to which video in pins are used for particular video input modes. Note that the following table describes what each video input mode does to configure the individual video input pins for both Video In 0 and Video In 1 ports, however each Video In port is individually mode configurable. Meaning Video In 0 can be set to mode 0 for four composite selectable video sources and Video In 1 can be set to mode 1 for two S-Video selectable video sources at the same time.
| # | Mode Name | Video In 0 Pin Name | Video In 1 Pin Name | Pin Mode | Input Format | VI# | Description |
| 0 | 4x CVBS | CVBS_0/Y/Y | CVBS_1/Y/Y | CVBS | Composite | 0 | Four selectable Composite input video input sources. |
| CVBS_0/C/Pb | CVBS_1/C/Pb | CVBS | Composite | 1 | |||
| CVBS_0/Y/Pr | CVBS_1/Y/Pr | CVBS | Composite | 2 | |||
| CVBS_0/C | CVBS_1/C | CVBS | Composite | 3 | |||
| 1 | 2x S-Video | CVBS_0/Y/Y | CVBS_1/Y/Y | Y | S-Video | 0 | Two selectable S-Video input video input sources. |
| CVBS_0/C/Pb | CVBS_1/C/Pb | C | |||||
| CVBS_0/Y/Pr | CVBS_1/Y/Pr | Y | S-Video | 1 | |||
| CVBS_0/C | CVBS_1/C | C | |||||
| 2 | 1x S-Video, 2x CVBS | CVBS_0/Y/Y | CVBS_1/Y/Y | Y | S-Video | 0 | One S-Video and two Composite selectable video input sources. |
| CVBS_0/C/Pb | CVBS_1/C/Pb | C | |||||
| CVBS_0/Y/Pr | CVBS_1/Y/Pr | CVBS | Composite | 1 | |||
| CVBS_0/C | CVBS_1/C | CVBS | Composite | 2 | |||
| 3 | 2x CVBS, 1x S-Video | CVBS_0/Y/Y | CVBS_1/Y/Y | CVBS | Composite | 0 | Two Composite and one S-Video selectable video input sources. |
| CVBS_0/C/Pb | CVBS_1/C/Pb | CVBS | Composite | 1 | |||
| CVBS_0/Y/Pr | CVBS_1/Y/Pr | Y | S-Video | 2 | |||
| CVBS_0/C | CVBS_1/C | C | |||||
| 4 | 1x Component, 1x CVBS | CVBS_0/Y/Y | CVBS_1/Y/Y | Y | Component | 0 | One Component and one Composite selectable video input sources. |
| CVBS_0/C/Pb | CVBS_1/C/Pb | Pb | |||||
| CVBS_0/Y/Pr | CVBS_1/Y/Pr | Pr | |||||
| CVBS_0/C | CVBS_1/C | CVBS | Composite | 1 |
See OSD User Configuration tool manual for information on setting the video input modes.
Controller Area Network header provides pins to two CAN differential bus transceivers, ground, and +5.0 volt power connections. Intended only to be used with 5 volt CAN buses.
| Pin # | Name | Description |
| 1, 2 | +5.0V In | Power to the onboard CAN bus transceivers. Must be regulated +5.0 volts. |
| 3, 4 | GND | Common grounding connection, intended for CAN bus signal connections. |
| 5 | CAN0_P | CAN0 bus high/positive differential signal connection. Could also be called or labeled as CAN0_H. Labeled as CAN0_N or D– on rev 2.2 PCBs. |
| 6 | CAN1_P | CAN1 bus high/positive differential signal connection. Could also be called or labeled as CAN1_H. Labeled as CAN1_N or D– on rev 2.2 PCBs. |
| 7 | CAN0_N | CAN0 bus low/negative differential signal connection. Could also be called or labeled as CAN0_L. Labeled as CAN0_P or D+ on rev 2.2 PCBs. |
| 8 | CAN1_N | CAN1 bus low/negative differential signal connection. Could also be called or labeled as CAN1_L. Labeled as CAN1_P or D+ on rev 2.2 PCBs. |
The Controller Area Network header has connections for two separate CAN transceivers in turn connect to two CAN controllers on the microcontroller. These two sets of connections are called ports, the first is channel 0 on the top side of the header, and the second is channel 1 on the bottom side of the header.
This port has terminating resistors or also known as a terminated CAN port.
| Pin # | Name | Description |
| 1 | +5.0V In | Power to the onboard CAN bus transceivers. Must be regulated +5.0 volts. |
| 3 | GND | Common grounding connection, intended for CAN bus signal connections. |
| 5 | CAN0_P | CAN0 bus high/positive differential signal connection. |
| 7 | CAN0_N | CAN0 bus low/negative differential signal connection. |
This port does not have terminating resistors or also known as non-terminated CAN port.
| Pin # | Name | Description |
| 2 | +5.0V In | Power to the onboard CAN bus transceivers. Must be regulated +5.0 volts. |
| 4 | GND | Common grounding connection, intended for CAN bus signal connections. |
| 6 | CAN1_P | CAN1 bus high/positive differential signal connection. |
| 8 | CAN1_N | CAN1 bus low/negative differential signal connection. |