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TMS320F28335: Setting Multiple Pins as External Interrupt on Same Interrupt Source

Ismail KARAKAS
Prodigy 155 points
Part Number: TMS320F28335

XINTx interrupts are mapped specified ports (for example for PORTA(0-31pins) mapped XINT1 and XINT2).

I wonder that what if I want to set multiple pins on PORTA to same XINTx (for example XINT1) ?

I reviewed XINTx block schemes but didn't see any arbiter to drive multiple external pins on same source.

Are there any way to this in F2833x ? If not, is that means device allows me to use only two PORTA pins as external interrupt pin at the same time ?

  • 0
    TI__Mastermind 42195 points

    XINTx can only be connected to one GPIO, there is no "or" function. There are a total of 7 on this device.

    XINT 1 and XINT 2 connect to GPIO0-31. XINT 3-7 connect to GPIO 32-63.

    So, yes, as you pointed out yes there are only two external interrupts that can connected to PORTA pins.

    Regards,
    Cody