Other Parts Discussed in Thread: FDC2114, CAPTIVATE-FR2676, CAPTIVATE-PGMR, FDC2214, FDC1004
Connecting the broken off FDC2114 part to the CAPTIVATE-FR2676 makes the red light on the CAPTIVATE-PGMR go on and stay on after disconnecting the FDC2114 as well as trigger a USB unregognized warning in windows. After disconnecting the FDC2114, if I try to enter debugging in CCS I get a No USB FET detected warning. Unplugging and plugging in the PGMR again and the CAPTIVATE boards work as normal until I try to plug the FDC2114 again.
I attach the CAPTIVATE boards to each other with their 20-pin edge connector. Then I connect the fdc2214 board to the FR2676 board as:
FDC2114 <-> FR2676
J3 3.3V <-> J5 3.3V
J3 GND <-> J5 GND (tried both)
On the FR2676 end, I've also tried the J7 3.3V and GND and the 48-pin connectors 3.3V and GND.
I broke off the FDC2114-EVM at the perforation between the MSP430 part and the FDC2114 part and got some headers soldered to them. I used the Sensing solutions to verify that everything is still working.
I tested the fdc2114 part for continuitiy and resistance between the pins and at J8 and J2. Couldn't find any short circuits.
I've also measured the CAPTIVATE-FR2676 GND and 3.3V with the PGMR connected and without. There are no continuities in either case and with the PGMR not connected the resistance is inf but with it connected the resistance between 3.3V and the GND is ~5-6kohm. I'm not an EE so I don't understand if this is an issue or not I was mostly just looking for short circuits.
Since I couldn't find any short circuits I thought maybe it was too much power was being pulled from the USB but I could only measure 1.7mA from the FDC2114.
Putting a 100ohm resistor in series with the FDC2114 prevents this and I could also enter debugging in CCS for the FR2676.
I'm wondering what would be the best way for me to power the FDC2114-EVM when using it together with the CAPTIVATE-PGMR and CAPTIVATE-FR2676? Is there any risk that I will damage it doing it this way with the 100ohm resistor? And why is the connecting I made causing this issue?
Thank you
Oscar
