Astro Carrier for NVIDIA® Jetson™ TX2/TX2i
Users Guide
Document: CTIM-00456
Revision: 0.24
Page 30 of 47
Date: 2021-10-04
Dual RS-485
Switch SW1
Position
Description
A
ON
Mode 0 Selection - RS-485 Selection
B
USER
Serial Link 0 - RX+ BIAS
C
OFF
Mode 1 Selection - RS-485 Selection
D
USER
Serial Link 0 - RX- BIAS
E
USER
Serial Link 1 - RX+ BIAS
F
USER
Serial Link 1 – RX- BIAS
Dual Disable
Switch SW1
Position
Description
A
ON
Mode 0 Selection - Disable Selection
B
XX
Serial Link 0 - RX+ BIAS
C
ON
Mode 1 Selection - Disable Selection
D
XX
Serial Link 0 - RX- BIAS
E
XX
Serial Link 1 - RX+ BIAS
F
XX
Serial Link 1 – RX- BIAS
10/100/1000 Ethernet (GBE) – HDC
Function
Gigabit Ethernet
Location
P2
HDC Bank
A
Pins
GBE0 – 38, 42, 44, 46, 48, 50, 52, 54, 56, 60, 62, 64, 66
GBE1 – 8, 10, 12, 14, 18, 20, 22, 24, 26, 28, 30, 32, 36
Design Instruction
An in-line buffer (Recommended Part: NC7WZ04P6X) with Resistors for the
GBE0 LED Pins (ACT#, LINK#, LINK100#, LINK1000#) is required
An in-line buffer (Recommended Part: NC7WZ16P6X) with Resistors for the
GBE1 LED Pins (ACT#, LINK#, LINK100#, LINK1000#) is required
No additional circuitry required for MDI pins
Route MDI connections direct to header/connector/device
