NVIDIA Jetson Xavier NX DG-09693-001_v1.7 | vii
12.1.1 I2C Design Guidelines ............................................................................................ 68
12.2 SPI ................................................................................................................................... 70
12.2.1 SPI Design Guidelines ............................................................................................ 71
12.3 UART................................................................................................................................ 72
12.4 CAN ................................................................................................................................. 74
12.5 Fan ................................................................................................................................... 75
12.6 Debug .............................................................................................................................. 76
12.7 USB Recovery Mode ....................................................................................................... 77
Chapter 13. PADS ................................................................................................................ 78
13.1 Internal Pull-ups for Dual Voltage Block Pins Power at 1.8V ...................................... 78
13.2 Schmitt Trigger Usage ................................................................................................... 78
13.3 Pins Pulled or Driven High During Power-ON .............................................................. 79
Chapter 14. Unused Interface Terminations ....................................................................... 81
14.1 Unused Multi-purpose Standard CMOS Pad Interfaces .............................................. 81
14.2 Unused Dedicated Special Purpose Pad Interfaces ..................................................... 81
Chapter 15. USB 3.2 and Wireless Coexistence .................................................................. 82
15.1 Mitigation Techniques .................................................................................................... 82
Chapter 16. Design and Bring-Up Checklists ...................................................................... 84
Chapter 17. Jetson Xavier NX Pin Descriptions .................................................................. 85
Chapter 18. General Routing Guidelines ............................................................................. 86
18.1 Signal Name Conventions .............................................................................................. 86
18.2 Routing Guideline Format .............................................................................................. 87
18.3 Signal Routing Conventions ........................................................................................... 87
18.4 Routing Guidelines ......................................................................................................... 87
18.4.1 General PCB Routing Guidelines .......................................................................... 88
18.5 Common High-Speed Interface Requirements ............................................................ 89
18.6 Test Points for High-Speed Interfaces .......................................................................... 90
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