Figure 2-20 Evaluation Board Schematic, Sheet 6 Of 6 - Lantronix xPico 110 Integration Manual

USB DEBUG PORT
CONN_USB_MINI
9
SH4
8 1 VBUSDEBUG
SH3 VBUS
11 2 SDDM
MH2 D-
3
SDDP
D+
10 4
R46
MH1 NC
7 5
DNP_0
SH2 GND
6
SH1
J5
Note: Since the Evaluation Board is common for both xPico 110 and xPico Wi-Fi device servers, the USB circuit above is only for
xPico Wi-Fi units, and not applicable to xPico 110 device servers.
xPico® 110 Embedded Device Server Integration Guide

Figure 2-20 Evaluation Board Schematic, Sheet 6 of 6

VUSB
Diode Array
F1
Route through de vice
500 mA
Install for ESD Prote ction
U14
6
6
5
VDD GND
4
4
C65 RClamp0502A
0.1uF Route the SDDx pair as 90 ohm
diffe re ntial ne t on a laye r ne xt to
the ground plane .
Minimiz e the use of Vias and ke e p
cle ar of othe r ne ts.
USB DEVICE PORT
CONN_USB_MINI
9
SH4
8
SH3 VBUS
11
MH2 D-
D+
10
R56
MH1 NC
7
DNP_0
SH2 GND
6
SH1
J6
USB TO SERIAL DEVICE
VUSB
C63 C64
0.1uF 4.7uF
U15
1 15
1 USBDM
14
USBDP
2 5
NC5
12
NC12
13
NC13
3 25
3 NC25
29
NC29
18
RESET#
23
NC23
27
OSCI
28
OSCO
VUSB_DEV
Diode Array
F2
Route through de vice
500 mA
Install for ESD Prote ction
6
6
1
VBUS_DEV
2 DDM
3 5
DDP
VDD
4
5
4
4
C75 RClamp0502A
0.1uF Route the DDx pair as 90 ohm
diffe re ntial ne t on a laye r ne xt to
the ground plane .
Minimiz e the use of Vias and ke e p
cle ar of othe r ne ts.
2: Functional Description
VUSB
R53
DNP_FDN306P
2
Q2
VUSB_3V3 VUSB_3V3
DNP_0.1uF
C62
0.1uF
30
USB_TX
TXD
2 USB_RX
RXD
32
RTS#
8
CTS#
31
DTR#
6
DSR#
7
DCD#
3
R47
RI#
22
DNP_1K
CBUS0
21
CBUS1
10
CBUS2
11
PWREN#
CBUS3
9
CBUS4
26
TEST
FT232RQ-xxxx
U20
1
DDM
DDM p2
1
2
GND
3
DDP
3 DDP p2
+5V_USB
0
USB Powe r Switch
3
Stuff option to Turn
powe r on only afte r
C60 C61
port ne gotiation.
0.1uF
USB_TX p4
USB_RX p4
VUSB
R48
10k
USB Circuit
24