# Connectors Designations

## {{@273#bkmrk-tiger-city-imx-embed}}

### Principle of designating connector pins

Each pin designation is composed of 2 parts.

#### Part 1

Choose a letter stating the type and purpose of the connector, chosen individually with ease of use by the user in mind.

##### General connectors

D - digital input pin  
H - digital input/output pin  
U - universal input/output pin  
G - ground potential

##### RS485

A - A pin of the connector  
B - B pin of the connector

##### RS232

T - Tx pin of the connector  
R - Rx pin of the connector

##### 1-Wire

5V - +5 V voltage  
1W - 1-Wire data

#### Part 2

Choose a digit representing the pin on the connector. In case of more than 10 pins on the connectors, letters should be used.

### Connector designations for IMX8  


<table border="1" id="bkmrk-eagle-designation-do" style="border-collapse: collapse; width: 100%; height: 1557.19px;"><colgroup><col style="width: 50.0618%;"></col><col style="width: 50.0618%;"></col></colgroup><thead><tr style="height: 35.3906px;"><td aria-sort="Brak" class="ak-renderer-tableHeader-sortable-column__wrapper align-center" style="height: 35.3906px;">**Eagle designation**

</td><td aria-sort="Brak" class="ak-renderer-tableHeader-sortable-column__wrapper align-center" style="height: 35.3906px;">**Documentation designation**

</td></tr></thead><tbody><tr style="height: 35.3906px;"><td colspan="2" data-cell-background="#e3fcef" style="height: 35.3906px;">**Digital inputs connectors**

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">1

</td><td style="height: 35.3906px;">G

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">2

</td><td style="height: 35.3906px;">D1

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">3

</td><td style="height: 35.3906px;">D2

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">4

</td><td style="height: 35.3906px;">D3

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">5

</td><td style="height: 35.3906px;">D4

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">6

</td><td style="height: 35.3906px;">D5

</td></tr><tr style="height: 35.3906px;"><td colspan="2" data-cell-background="#e3fcef" style="height: 35.3906px;">**Digital inputs/outputs connectors**

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">1

</td><td style="height: 35.3906px;">H1

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">2

</td><td style="height: 35.3906px;">H2

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">3

</td><td style="height: 35.3906px;">H3

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">4

</td><td style="height: 35.3906px;">G

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">5

</td><td style="height: 35.3906px;">H4

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">6

</td><td style="height: 35.3906px;">H5

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">7

</td><td style="height: 35.3906px;">H6

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">8

</td><td style="height: 35.3906px;">H7

</td></tr><tr style="height: 35.3906px;"><td colspan="2" data-cell-background="#e3fcef" style="height: 35.3906px;">**Universal inputs/outputs connector**

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">1

</td><td style="height: 35.3906px;">U1

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">2

</td><td style="height: 35.3906px;">U2

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">3

</td><td style="height: 35.3906px;">G

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">4

</td><td style="height: 35.3906px;">U3

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">5

</td><td style="height: 35.3906px;">U4

</td></tr><tr style="height: 35.3906px;"><td colspan="2" data-cell-background="#e3fcef" style="height: 35.3906px;">**RS485 1/2 connectors**

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">1

</td><td style="height: 35.3906px;">A1

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">2

</td><td style="height: 35.3906px;">B1

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">3

</td><td style="height: 35.3906px;">G

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">4

</td><td style="height: 35.3906px;">A2

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">5

</td><td style="height: 35.3906px;">B2

</td></tr><tr style="height: 35.3906px;"><td colspan="2" data-cell-background="#e3fcef" style="height: 35.3906px;">**RS485 3/4 connectors**

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">1

</td><td style="height: 35.3906px;">A3

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">2

</td><td style="height: 35.3906px;">B3

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">3

</td><td style="height: 35.3906px;">G

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">4

</td><td style="height: 35.3906px;">A4

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">5

</td><td style="height: 35.3906px;">B4

</td></tr><tr style="height: 35.3906px;"><td colspan="2" data-cell-background="#e3fcef" style="height: 35.3906px;">**RS232 1/2 &amp; 1-Wire connectors**

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">1

</td><td style="height: 35.3906px;">G

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">2

</td><td style="height: 35.3906px;">T1

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">3

</td><td style="height: 35.3906px;">R1

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">4

</td><td style="height: 35.3906px;">T2

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">5

</td><td style="height: 35.3906px;">R2

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">6

</td><td style="height: 35.3906px;">1W

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">7

</td><td style="height: 35.3906px;">5V

</td></tr><tr style="height: 35.3906px;"><td style="height: 35.3906px;">8

</td><td style="height: 35.3906px;">G

</td></tr></tbody></table>