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My P3^7 remains low even I set it

Maaz Qazi

I am using 89C51ED2, my code is executing fine but the P3^7 does not set high on reset and even I kept it high in code. Why is this occuring?

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  • 0 in reply to erik malund

    I had removed the chip 4052 which is connected with ED2 but found the pin low. The simulator is showing the state of the P3^7 as high. And this problem exist not only in one hardware, but in all of my hardwares. May be this is the problem of 89C51ED2 Dip package, as I've used 89C51ED2 in PLCC44 package it works fine.
    Is this problem related with the built in XRAM or XEEPROM memory? Please help me.

    Maaz Qazi

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  • 0 in reply to erik malund

    I had removed the chip 4052 which is connected with ED2 but found the pin low. The simulator is showing the state of the P3^7 as high. And this problem exist not only in one hardware, but in all of my hardwares. May be this is the problem of 89C51ED2 Dip package, as I've used 89C51ED2 in PLCC44 package it works fine.
    Is this problem related with the built in XRAM or XEEPROM memory? Please help me.

    Maaz Qazi

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