Kontron COMe Starterkit Eval T2 - Manual (Page 79)

COM Express Interfaces
Figure 29: USB Reference Design
PICMG ® COM Express ® Carrier Board Design Guide Draft Rev. 2.0 / December 6, 2013 79/218
USBP2J_EMI
USBP2_EMI
USBP1J_EMI
USBP1_EMI
GND_P1
VCC_P2
GND_P2
VCC_P1
USB_2_OCJ
USBP2P
USBP2N
USB_3_OCJ
VCC_5V_SBY
VCC_3V3_SBY
VCC_5V0
CEX USB0-
CEX USB0+
CEX USB1-
CEX USB1+
CEX USB_0_1_OC#
CEX USB_2_3_OC#
CEX USB2-
CEX USB2+
ESD protection
Ports are powered by 5V Standby to support Wake On USB.
Connect to VCC_5V0 if Wake On USB is not needed
ESD protection
Note: Connection between logic GND and
chassis depends on grounding architecture.
Connect GND with chassis on a single point
even this connection is drawn on all schematic
examples throughout this document.
USB0
USB1
Not mandatory by USB Spec.
Leave unconnect if OS popup
messages are not need.
Not mandatory by USB Spec.
Leave parts if OS popup
messages are not need.
FB14
50-Ohms@100MHz 3A
FB14
50-Ohms@100MHz 3A
+ C76
47uF/16V
+ C76
47uF/16V
1
2
F1
POLY SW 0.5A 13.2V
F1
POLY SW 0.5A 13.2V
D5 D5
2 3
4 1
FB16
50-Ohms@100MHz 3A
FB16
50-Ohms@100MHz 3A
J6 J6
Vcc
1
Dn
2
Dp
3
Gnd
4
CG
5
CG
6
CG
7
CG
8
C77
1nF/25V
C77
1nF/25V
L3
90-Ohms@100MHz 300mA
L3
90-Ohms@100MHz 300mA
1
4 3
2
C68
100nF/25V
C68
100nF/25V
D4 D4
2 3
4 1
C75 C75
+
C70
47u 16V
+
C70
47u 16V
1
2
+
C71
47uF 16V
+
C71
47uF 16V
1
2
C72
4 x 10nF/25V
C72
4 x 10nF/25V
FB10 FB10
C69
100nF/25V
C69
100nF/25V
U7A
74AHC08
U7A
74AHC08
1
2
3
1
4
7
C73 C73
R44 33K R44 33K
FB13
4 x 50-Ohms@100MHz 3A
FB13
4 x 50-Ohms@100MHz 3A
C74 C74
J5B
RJ45 with Dual USB
J5B
RJ45 with Dual USB
VCC1
UA1
P0#
UA2
P0
UA3
GND1
UA4
VCC2
UB1
P1#
UB2
P1
UB3
GND2
UB4
SHLGND
H1
L1
90-Ohms@100MHz 300mA
L1
90-Ohms@100MHz 300mA
1
4 3
2
FB93
50-Ohms@100MHz 3A
FB93
50-Ohms@100MHz 3A
R43
1k
R43
1k
L2
90-Ohms@100MHz 300mA
L2
90-Ohms@100MHz 300mA
1
4 3
2
D3 D3
2 3
4 1
U6
MIC2026
U6
MIC2026
ENA
1
FLGA
2
FLGB
3
ENB
4
OUTA
8
IN
7
GND
6
OUTB
5 FB9 FB9
FB15
50-Ohms@100MHz 3A
FB15
50-Ohms@100MHz 3A
FB12 FB12
ENABLE_VBUS