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→Handling bootstrap signals
[[File:TBD.png|thumb|center|600px|captionConcept solution to use bootstrap signals]]
During the processor reset cycle, MEZZANINE_GP0, MEZZANINE_GP1 and MEZZANINE_GP2 [1] are isolated from user's application logic by a bus switchthat is in high-impedence state. Bus switch's BUS_SW_OE_n signal is connetcted connected to another processor's GPIO (GPIO1_IO01 in the example). Before configuring and using MEZZANINE_GPx signals, application software needs to:
*initialize GPIO1_IO01 as GPIO ouput
*set GPIO1_IO01 to logic level 0 in order to enable the switch.