I am now analyzing the schematic of the Xavier, and I do not understand the Power Logic between DC Jack and VCC_SRC_FET.
And can somebody help me to analyze the Schematic?
may be you know as well how to connect gps to xavier for time synchronization [ PPS ] ?
It seems that some pins should be determined and some software support added. reference
Thanks
When Q6 turns on, the voltage of VCC_DCIN_EN and VCC_DCIN_Q is equal, and these two valtage is 0 V, and the MOSFET require VGS(th) AS FOLLEW, and how can MOS turn on? External Media
I am a hareware engineer, and in my opinion you can do as follew, I hope this can help.
You can use the document the can be download from http://developer.nvidia.com/embedded/dlc/jetson-xavier-pinmux to help you to select a appropriate pin that can be suitable for the electrical level of PPS.
Then modify the devicetree
Thank you for pointing out!
It seems that 2 pins should be picked from the set below:
UART5_TX J58
UART5_RX H58
UART5_RTS K58
UART5_CTS H57
Specifically J58, and H58, but how to visually find them at the surface of the devkit? External Media
You may look the connectors in the Schematic, J30 for example, and you can find the signal in J30 that may be suitable for PPS
Because you use the Xavier Kit developed by NVIDIA, so you must find the useable pin that NVIDIA provide in the Kit.
@suiyufeng726, Thanks.
It seems that the task narrowed down to the issue of mapping of UART5tx and UART5rx to J30 pins that not only need to be determined, but also that will require some device tree modification for the maping to happen. External Media
Is that what you meant?
Or your idea is that the mapping is not required as long as the signal characteristics will be the same and as long as the device tree can be modified?
Thanks.