Hi Mike,
The D+ and D- are the USB connections for the Target microcontroller USB, so may be the ones more suited to routing out on your basedboard.
The IF+ and IF- are for the mbed Interface itself, and we wouldn't really recommend breaking them out. The standard use model for using the mbed is to plug the USB cable in to the mbed itself (for programming and optionally power), and a USB connection external to the mbed is for the target USB device.
So we don't recommend using these IF+/- pins, especially as it could lead to people plugging in two cables to the same interface. We can't guarantee they will work, and they really are there as a future option to potentially allow use on custom boards that have restricted access (e.g. inside a prototype case).
For a baseboard (I assume your case), the programming interface should really be accessed by pluging a cable in to the min-B on the mbed Microcontroller board.
Hoep this helps!
Simon
Hi,
We are trying to connect the MBED to an embedded existing development platform. We have allocated all the MBED pins except for the IF+ and IF-. Are these for some sort of IrDA interface?
Thanks
Mike Beach
Hitex UK