> For the complete documentation index, see [llms.txt](https://nxp.gitbook.io/vmu-rt1176/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nxp.gitbook.io/vmu-rt1176/production-v1-carrier-board-connectors.md).

# Production (V1) Carrier Board Connectors

The NXP reference board design production version units have a slightly different connector set than what has tradionally been included in the standard V6X design and also the Holybro V6X-RT units.\
\
The key differentiators are:\
 \- No separate IO processor required. All PWMs including redundant coming from RT1176

* Three CAN ports
* 100BaseT1 two wire ethernet
* Additional SE05x secure element on the base board in addition to the FMUMRT1176
  * NFC antenna interface to secure element
* DSM and AUX RC ports in addition to "RC IN"

\ <br>

<figure><img src="/files/QzRBUFRmSlq7XXw9d7nM" alt=""><figcaption><p>12 RC-PWM outputs are available </p></figcaption></figure>

<figure><img src="/files/s6ym7hrUFWFRk287di7B" alt=""><figcaption><p>Dual redundant power inputs. </p></figcaption></figure>

<figure><img src="/files/MEokUH7LjWZg8wpP8A3D" alt=""><figcaption><p>Right side view interfaces</p></figcaption></figure>

## Right side interfaces&#x20;

They include:

* AD\@I/0 Analog and GPIO
* CAN1, CAN2: Dual CAN-FD interfaces employing CAN-SIC (Signal Improvement) CAN phys.
* I2C interface
* USB-C interface and USB on JST-GH pins. (parallel pin connections not independent)<br>

![](/files/7SNSpg0EXVPGYqegOUjN)

<figure><img src="/files/hXRNaJxQLtdOcm04eJWj" alt=""><figcaption></figcaption></figure>

## Left Side Connections

* CAN3: (extra additional ) CAN-FD interfaces employing CAN-SIC (Signal Improvement) CAN phys.
* T1-ETH: 100BaseT1 Two wire 100MBPS Ethernet&#x20;
* TELEM1/2/3: 3x Telemetry ports with Hardware handshaking
* UART\&I2C: 4th UART, no hardware handshake, I2C, NFC\_GPIO included
* Debug interface compliant to Pixhawk-DEBUG-FULL standard (aka DCD-F), including SWD and Console access.\
  \
  \ <br>

  <figure><img src="/files/ZA2KBnCx8kMDOxA0ma9x" alt=""><figcaption><p>Front connectors</p></figcaption></figure>

## Front side connectors

* DSM: DSM RC radio input
* NFC: NFC connection to carrier board Secure Element. (interface may be accessible even when not powered?)
* GPS1: PX4 full GPS connector including Arming Button interface, beeper, magnetometer and RGB LED&#x20;
* GPS2: Aux GPS, reduced pinout on connector.
* SPI: External SPI interface including two hardware chip selects, nSYNC, DRDY1/2 and SPI\_nRST

## PWM and SBUS IBUS RC input

![](/files/k5M4l64Ca2Cj8B6m4pQm)  ![](/files/Y0TZaxpD1D5a54C6GfPE)

Typical connection for SBUS/IBUS  input  from RC remote controller. (note: Alternative RC interfaces possible)

## Debugger and serial console connection

<figure><img src="/files/RWLKm492R1iCWC3PG9hh" alt=""><figcaption><p>Use Cognipilot Neural probe or DCD-LZ-ADAPT or similar adapter to connect a debugger or serial console to the Pixhawk-debug-full port (AKA DCD-F)</p></figcaption></figure>

Use Cognipilot Neural probe or DCD-LZ-ADAPT or similar adapter to connect a debugger or serial console to the Pixhawk-debug-full port (AKA DCD-F)\
\
<https://docs.px4.io/main/en/debug/swd_debug.html>\ <br>

## Indicator LEDs

Note the legend for the LEDs is actually shown above the 4 led holes in the enclosure.

<figure><img src="/files/5mtfbNoqzm0c2xARYvbz" alt=""><figcaption><p>LED indicators show Ethernet connection and activity, Power supply present, and the staus of the ANALOG pin input setting. (see schematics for ASEL usage)</p></figcaption></figure>

### ASEL analog input select indicator

<figure><img src="/files/WHc5WCgCjsNkIDcyUZgS" alt=""><figcaption><p>Schematic showing alternative function. D5 = ASEL LED.<br></p></figcaption></figure>

Schematic showing alternative function. D5 = ASEL LED.\
J14 pin 7 'ADC1\_6v6\_Aux', can be selected to connect either 'ADC1\_6v6' or  Vdd Servo rail to the ADC to read the voltage. \ <br>

<figure><img src="/files/17a7wFobe7Sa8sHvmhLV" alt=""><figcaption><p>PWM labelling on side indicates the ground pin (Brown or Black wire) and the Signal/PWM pin (orange, white or blue)</p></figcaption></figure>