Timeline for FT245RL - device descriptor read/64, error -32 on connect
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 11, 2017 at 2:27 | comment | added | gyroninja | Looks like with them shorted it would immediately disconnect. Leaving pin 4 floating seems to make it work correctly, though my pcb is kind of a mess now. | |
| May 8, 2017 at 6:12 | comment | added | Tom L. | You should not short them. Pin 4 should be floating for your application. A PC will not take care of that since the USB-A <-> Micro-USB-A cable probably just has 4 pins but once you connect your device to another micro-usb port it won't probably work as the ID pin decides between host and peripheral mode. | |
| May 7, 2017 at 11:30 | vote | accept | gyroninja | ||
| May 7, 2017 at 11:30 | comment | added | gyroninja | Thanks man. I just shorted pin 4 and 5 and it worked. :) | |
| May 7, 2017 at 11:05 | comment | added | Tom L. | In addition, it appears that all your pins are backward (at least if the unconnected pin is pin 5). Double check with the datasheet (right side of the datasheet shows the footprint from Top and labels Pins1 and 5) | |
| May 7, 2017 at 11:00 | comment | added | Tom L. | Your VCCIO doesn't match the CPLD OR the FT245RL, something is wrong with your voltage generation. VCREF appears to be wrong as well. I'm wondering: Either you're measuring wrong or you shouldn't have been able to program the CPLD | |
| May 7, 2017 at 10:56 | comment | added | Tom L. | Micro USB-B is NOT USB-B .. your connector in the schematic has 4 pins, wheras micro-usb-b has 5. In your connector, Pin 4 is ground - for Micro-USB-B GND would be 5. | |
| May 7, 2017 at 10:40 | comment | added | gyroninja | * I'm using this micro usb port. Here's pic related showing the usb port. * The traces are ~1.5mm. *No clue what that is, so no. *PCB stackup is 2 layers (copper) *Yes, I programmed my cpld earlier. *VCC: 1.379 VCCIO: 1.227 *What do you mean, there would be no power *There is no short | |
| May 7, 2017 at 5:21 | history | answered | Tom L. | CC BY-SA 3.0 |
