Instructions

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FAQs

Q: I'm trying to power the LaunchPad from a USB power supply (not an actual USB host), and it is

not working. Does the LaunchPad not support this?

Unfortunately Rev1.4 does not. USB hubs typically shouldn't enable power to their downstream devices

until the hubs themselves enumerate on the host, and that's what the TUSB2046 on the Rev1.4 F5529

LaunchPad does through the TPS2041B power switches. If the hub never enumerates, power is not

provided to the target F5529. Because the downstream device is permanently attached in this application,

the TPS2041B switches are not required by the USB specification. Rev1.5 and newer F5529 LaunchPads

have these switches removed, to avoid this problem.

Again, the benefit of the hub is single-cable development. Other power supplies can still be applied via the

power header.

Q: With the female headers on the bottom, the board does not sit flat on the table, and I can't

unsolder them. Why did TI do this?

A: For several reasons. A major feedback item on previous LaunchPads was the desire for female

headers instead of male ones. But simply using female instead is problematic, because compatibility with

existing BoosterPacks would be lost, and some people prefer male headers. So, adding female headers

without removing male ones satisfies both preferences. It also allows more flexibility in stacking

BoosterPacks and other LaunchPads.

The downside to this approach is perhaps that the board does not sit flat. But while a USB cable is

attached (the usual development model), it tends to not sit flat anyway.

For those wishing the board to sit flat, holes are drilled in the corners so that standoffs can be fastened.

Rubber bumper feet also should work.

Q: Where can I find hardware design files for older F5529 LaunchPad revisions?

A: Aee the F5529 LaunchPad wiki at http://processors.wiki.ti.com/index.php/MSP430F5529_LaunchPad.

SLAU533A–September 2013–Revised January 2014 MSP430F5529 LaunchPad™ Development Tool (MSP

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EXP430F5529LP)

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