4.10.1. Onboard I/O control

GPIO2 is dedicated to the USB, push button, and MCI status signals as listed in Table 4.42.

Table 4.42. GPIO2 and MCI status signals

GPIO2 bitAccessResetDescription
[7:5]Reserved
[4]Read/WriteInputUSB HC suspend and wakeup control
[3]Read/WriteInputUSB suspend and wakeup control
[2]Read-onlyInputGeneral-Purpose push button
[1]Read-onlyInputMCI Write-protect status
[0]Read-onlyInputMCI Card-present status

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