shahabamo Posted July 6, 2015 Report Share Posted July 6, 2015 Hi, I read the proposed workaround for putting FT2232 pins in High impedance to made JTAG pins accessible by an external programmer(+), But if we intend to design a new board, is it possible to put FT2232 in RESET or SUSPEND mode by modifying the design and adding a jumper to the board? regards. Quote Link to comment Share on other sites More sharing options...
Jack Gassett Posted July 6, 2015 Report Share Posted July 6, 2015 I'm not sure off the top of my head, I would recommend looking at the FT2232H datasheet and see what the behavior is when in reset mode. Jack. Quote Link to comment Share on other sites More sharing options...
johnbeetem Posted July 6, 2015 Report Share Posted July 6, 2015 Hi, I read the proposed workaround for putting FT2232 pins in High impedance to made JTAG pins accessible by an external programmer(+), But if we intend to design a new board, is it possible to put FT2232 in RESET or SUSPEND mode by modifying the design and adding a jumper to the board? regards. Here's my opinion offered WITHOUT WARRANTY: I think you can hold the FT2232H in reset by pulling pin 14 to ground. You can do this by soldering a jumper wire on 10K resistor R28, which is next to FT2232H pin 14. The FT2232H data sheet doesn't explicitly say what happens to the I/O pins when in reset. However, FTDI does have an application note on the subject: http://www.ftdichip.com/Support/Documents/AppNotes/AN_184%20FTDI%20Device%20Input%20Output%20Pin%20States.pdf According to AN_184, the programmable I/O pins are tri-stated but some have pull-ups. Quote Link to comment Share on other sites More sharing options...
shahabamo Posted July 6, 2015 Author Report Share Posted July 6, 2015 jack and john, Thanks for the reply. I will test it and post the result soon. Quote Link to comment Share on other sites More sharing options...
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