NVIDIA Jetson TX2/TX2i OEM Product Design Guide
JETSON TX2/TX2i OEM PRODUCT | DESIGN GUIDE | 20180618
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5.3 SATA
A Gen 2 SATA controller is implemented on Jetson TX2/TX2i. The interface is brought to the module connector as show n in the
figure below .
Figure 18. SATA Connection Example
Tegra
PEX_TX5P
PEX_TX5N
PEX_RX5P
PEX_RX5N
PEX, USB
3.0 & SATA
SATA_TX
–
SATA_RX
–
PEX1_CLKREQ#
SATA_DEV_SLP
D45
D46
G45
G46
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
D47
PEX_L2_CLKREQ_N
Level
Shifter
VDD_1V8
VDD_3V3_SLP
PEXCTL
Mux
C47
PMIC
GPIO7
SEL
VDD_12V_SLP
VDD_5V0_IO_SLP
0.01uF
0.01uF
0.01uF
0.01uF
Jetson TX2/TX2i
SATA Design Guidelines
Table 26. SATA Signal Routing Requirements
Parameter
Requirement
Units
Notes
Specification
Max Frequency
Bit Rate / UI
3.0 / 333.3
Gbps / ps
1.5GHz
Topology
Point to point
Unidirectional, differential
Configuration / Device Organization
1
load
Max Load (per pin)
0.5
pf
Termination
100
Ω
On die termination
Impedance
Reference plane
GND
Trace Impedance
Differential Pair / Single Ended
95 / 45-55
Ω
±15%
Spacing
Trace Spacing
Pair-to-pair (inter-pair)
Stripline / Microstrip
To plane & capacitor pad
Stripline / Microstrip
To unre lated high-speed signals
Stripline / Microstrip
3x / 4x
3x / 4x
3x / 4x
Dielectric
Length/Skew
Breakout region
Max Length
Spacing
41.9
Min width/spacing
ps
4x or wider dielectric height spacing is
preferred
Max Trace Length/Delay
76.2 (480)
Mm (ps)
Max PCB Via distance from pin
6.29 (41.9)
mm (ps)
Max Within Pair (Intra-Pair) Skew
0.15 (0.5)
mm (ps)
Intra-pair matching between subsequent discontinuities
0.15 (0.5)
mm (ps)
Do trace length matching before hitting
discontinuities
Differential pair uncoupled length
6.29 (41.9)
mm (ps)
AC Cap
AC Cap Value
typical (max)
0.01 (0.012)
uF
AC Cap Location (max distance from adjacent discontinuities)
8 (53.22)
mm (ps)
The AC cap location should be located as
close as possible to nearby
discontinuities.
Via
