![background image](http://html.mh-extra.com/html/advantech/mi-o-128/mi-o-128_design-manual_2858351012.webp)
12
28
USB1 D-
I/O USB2
USB2 Data-
30
USB1 D+
I/O USB2
USB2 Data+
32
GND
GND
GND
GND
34
NC
Table 1.3.1-2 Signal Description for USB in SMD 64-Pin
1.3.2 Schematic Guidelines
Considering EMI and ESD issue, the common mode choke and TVS (Transient Voltage
Suppression) diode with low capacitance, which should be less than 1.0pF, are the
recommendatory solution. For placement concern, EMI and ESD solution should be
close to connector.
Figure 1.3.2-1 EMI and ESD demonstration for USB Application
GND_Chasis
GND_Chasis
USB_D+
USB_D-
USB_z_D-
CN29
+5V
1
DATA-
2
DATA+
3
GND
4
PT
H
_1
5
PT
H
_2
6
B52
90_100MHZ
1
4
2
3
D6
AZC099
1
2
3
4
6
5
C210
0.1uF
16V
+V5_USB
C211
0.1uF
16V
+V5_USB
ESD Protection close to connector
EMI Solution
close to connector
CN
CPU
Board
I/O Board