MIO I/O Reservation - 3.3 English

Control Interfaces and Processing System LogiCORE IP Product Guide (PG352)

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3.3 English

The MIO Reservation feature allows you to select the unused/unassigned MIO’s as GPIO/AUX-IO. To select these, you are required to click the MIO PIN view button from the toolbar and then select GPIO/AUX-IO options in the External Usage column for the respected MIO. If any MIO is allocated to a peripheral then that MIO cannot be set as GPIO/AUX-IO, so its External Usage drop down is disabled.

If the MIO usage is GPIO, then you can set its output data as active-High or active-Low and direction as In or Out. After boot, this value will be driven on IO when it is set in Out direction. If the MIO usage is AUX-IO, only then you can set direction as In/Out.
Figure 1. MIO I/O Reservation Settings

The IO-Configuration page also allows you to select 64 GPIO-EMIO pins in PMC domain and 32 GPIO-EMIO pins in PS domain. Upon enabling this, these pins will be exposed to the PL region.