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Does the power supply dip on the DK-S7G2 when the GainSpan SDIO wireless board is plugged in?

Last Updated: 05/02/2016

Question:

I'm seeing my power supply drop when I plug in the Gainspan SDIO wireless board on my DK-S7G2 kit. Is this expected behavior?

Answer:

The board design on the DK-S7G2 is such that a power supply drop of about 600mV for 20ms is typical when the SDIO wireless board is plugged in. This could cause unexpected code execution on power-on reset. It is recommended that the SDIO wireless board be plugged in prior to running in debug mode. When running in stand alone mode it is recommended that the SDIO board be inserted prior to power up.