Agilent Infiniium (Motorola VP22) Motherboard USB Pinouts for DOM SSD

The Motorola VP22 motherboard used in a variety of modern Agilent’s Infiniium series oscilloscope (the ones with Megazoom) and logic analyzers has a 5-pin USB port that’s not quite the same as the standard headers on most motherboards.

The reason I needed the pinouts of the USB port is because I have a 40-pin DOM SSD to replace the old clunky mechanical hard drive, which needs 5V for power.

I don’t want to modify/resolder the original wire harness (for the LS-120 and CD-ROM drive) nor I have the molex connectors to make a power splitter. Luckily, I found somewhere that I can safely tap a 5V for low power devices: the internal USB header. Here’s a picture with the DOM SSD module wired:

VP22 USB Power Tap

This post serves as a reminder to myself that the ground is the second pin to the left and 5V is the rightmost pin. The pinout diagram as follow:

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