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Please omit the previous email. Hi All I have a question. I am using my own design board. I am using the JTAG to program the board. What about the power supply. The pin 11 of the JTAG connector requires 3.3 v. Is this supplied by the parallel port?. I connect the board through the newmicro JTAG and then to the parallel port. Should I connect an external source (3.3 v) to the pin11? In general how the JTAG connector is powered. Is it through the parallel port or it requires an external source. Can any one help me on this? Thanks Praveen

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Praveen, Pin 11 of the command converter should be connected to the I/O supply on your board. It powers the output buffer for the logic translation so the output is at the correct voltage for the device you are using. Typically this is 3.3v... -- dB --- praveen <> wrote: > Please omit the previous email. > Hi All > I have a question. I am using my own design board. I am using the > JTAG > to program the board. What about the power supply. The pin 11 of the > JTAG connector requires 3.3 v. Is this supplied by the parallel > port?. > > I connect the board through the newmicro JTAG and then to the > parallel port. > > Should I connect an external source (3.3 v) to the pin11? In general > how the JTAG connector is powered. Is it through the parallel port or > it requires an external source. Can any one help me on this? > Thanks > Praveen __________________________________

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Hello Praveen It seems to me that the JTAG converter receives 5 V from the parallel port for one half of its level translation, and 3.3 V from the target board for the lv end of its level translation. Best regards Robert On Jul 19, 2004, at 1:12 AM, praveen wrote: > Please omit the previous email. > Hi All > I have a question. I am using my own design board. I am using the JTAG > to program the board. What about the power supply. The pin 11 of the > JTAG connector requires 3.3 v. Is this supplied by the parallel port?. > > I connect the board through the newmicro JTAG and then to the > parallel port. > > Should I connect an external source (3.3 v) to the pin11? In general > how the JTAG connector is powered. Is it through the parallel port or > it requires an external source. Can any one help me on this? > Thanks > Praveen

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