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Altera_Forum's avatar
Altera_Forum
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17 years ago

Epcs4 interface problem

Hi,

I am using EPCS4SI8N through SPI interface to a microcontroller to write and read data. Right now I have done the connections accordingly but have problems with read and write to the serial EEPROM.

I am not getting any response for any of the opcodes. The logic looks simple but dont know where I am going wrong.

Thanks in advance!

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  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    17 years ago

    Hi,

    255 probably means High Impedance. you can check it by pulling it down. are you sure that the IC is properly powered?
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    17 years ago

    Hi,

    By pulling it down u mean...connect a resistor from that line to ground?

    Thanks!
  • Altera_Forum's avatar
    Altera_Forum
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    17 years ago

    --- Quote Start ---

    Hi,

    By pulling it down u mean...connect a resistor from that line to ground?

    Thanks!

    --- Quote End ---

    yes, if it's a real 1 then you shoudn't have any problem. but if it's Z ( that is shown as 1 ) you will get 0. right?