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FGPIO - high Impedance during power up

Ravi sankar

Hi, I would be glad if any one can help me how to change the default high impedance state during reset/powering up of my LPC 2468 MCU. I want to make them logic 0(LOW) till I change the state in the code. My specific application is to give the o/p of GPIOs to IDT74ALVC164245PAG8 which considers high impedance of GPIOs as high (mistakenly) which eventually turns ON some special relays,which is destroying my end application.

Any help from experienced users would be appreciated.

Thanks in advance.

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  • 0 in reply to ImPer Westermark

    Hi,

    Thanks for the solution. However somehow we managed to achieve this. We have changed the direction of IDT level converter from Output to Input mode using some pull down resistors of about 500 ohm. After the processor boots up, the direction has been changed from Input to Output mode in the software. Our problem has been solved.

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  • 0 in reply to ImPer Westermark

    Hi,

    Thanks for the solution. However somehow we managed to achieve this. We have changed the direction of IDT level converter from Output to Input mode using some pull down resistors of about 500 ohm. After the processor boots up, the direction has been changed from Input to Output mode in the software. Our problem has been solved.

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