> 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/programming-pre-production-vmu-rt117x.md).

# Programming pre-production VMU-RT117x

***DRAFT DRAFT DRAFT*** \
How to program the VMU using a JLINK\
(JLINK - loadfile or loadbin but start at address 0x30000000)

## Interim instructions

Official instructions will eventually be on the PX4.io website and Cognipilot website.\
These are interim instructions for pre-production boards.

There are TWO variants of pre-production boards:

1\) ALPHA boards: These are the FMUMRT1176 on an ALPHA carrier board. This board can be identified by having TWO debug connectors and a solid row of PWM like headers at one end.

2\) BETA boards: These are the FMUMRT1176 on a BETA carrier board. This board is intended to become production. It can be identified by THREE CAN ports and the end with PWM ports shows 12PWM, a small gap, then AUX and RC IN 3 pin connectors. \
![](/files/RTjafSK3nBUp7qqdIkNL)

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