USB, PCIe, and UFS
Jetson AGX Xavier Series Product
DG-09840-001_v2.5 | 58
Parameter
Requirement
Units
Notes
Max PCB within pair (intra-pair) skew
0.15 (0.5)
mm (ps)
Max Pair to Pair skew
Tightly coupled case
Nominally coupled case
33
100
ps
Within pair (intra-pair) matching between
subsequent discontinuities
0.15 (0.5)
mm (ps)
Do trace length matching before hitting
discontinuities
Differential pair uncoupled length
41.9
ps
Via
Via placement
Place GND vias as symmetrically as possible to data pair vias. GND via distance
should be placed less than 1x the diff pair via pitch
Max # of Vias
PTH Vias
Micro-Vias
2
No requirement
Max Via stub length
0.4
mm
Longer via stubs would require
review
Discontinuity
Voiding
Voiding the plane directly under the
pad 5.7 mils larger than the pad
size is recommended.
General
Keep critical PCIe traces such as PEX_TX/RX, TERMP etc. away from other signal traces or unrelated power traces/areas or power
supply components
Table 7-18.
UFS Signal Connections
Ball Name (Function)
Type
Termination
Description
UPHY_TX10_P/N
(UFS_TX0_P/N)
DIFF
OUT
Differential Transmit Data Pairs: Connect to DIN0_T/C pins of
UFS device
UFS0_REF_CLK
O
UFS Reference Clock: Connect to REF_CLK pin on device.
UFS0_RST
O
UFS Reset: Connect to RST pin on device
Note: Due to the power connections on the module, the SoC UFS sideband signal interface (UFS0_REF_CLK and UFS0_RST)
supports 1.2V operation only. If higher voltage is required by the connected UFS device, level shifters will be needed.