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SWD programming stm32l151@2,8V by using usb powered stm32F4 discovery

Question asked by casano.giovanni on May 31, 2012
I would try to program a custom made board, with stm32l151 micro onboard, by using
one stm32F4 discovery board.

Now, before I burn something, discovery board is powered from USB 5V; my custom made
board is powered at 2,8V: is it still possible to connect the two board, by using the SWD
connector for programming?

Stm32L151 datasheet reports a voltage tolerance up to 4V for each of the pins on the micro.

May I be confident I won't burn anything?
Thank you for your answer.