Dear sir / madam,
I would be very grateful if you could check the circuit attached regarding the Oscillator and JTAG interface.
The 2 things I am unsure of are:
- The oscillator we are using is an oscillator module (i.e. for better reliability) which has a single output which I have connected to OSCIN. Thus OSCOUT and KELVIN-GND are unconnected.
- We are using a 5V oscillator output which step down to 3.3V level using a potential divider (this has worked ok before on a PIC 3V3 micro)/
- JTAG INTERFACE
- The reset from the JTAG device is connected to the warm reset (nRST) of the micro is that correct?
- On other micro's we have connected this to the reset pin as there is usually only one. In this case could it be connected to the power on reset (nPORRST)?
p.s. I have based the design on the RM48 HDK development board.