Toradex Verdin, Manual

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Verdin Carrier Board Design Guide
Preliminary
– Subject to Change
Toradex AG l Ebenaustrasse 10 l 6048 Horw l Switzerland l +41 41 500 48 00 l www.toradex.com l info@toradex.com
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A USB compliant design needs to detect over-current on the provided bus power output. The
output rail needs to be turned off in case an over-current condition occurs. The USB_1_OC# signal
is used to notify the module that an over-current condition has occurred. This signal is active-low
and requires a pull-up resistor to 1.8V on the baseboard.
Figure 17: USB OTG reference schematic
2.4.2.2 USB-C Dual Role Schematic Example
The term USB OTG is only used in conjunction with the USB Micro-AB or the obsolete USB Mini-AB
receptacle. When it comes to USB Type-C receptacles and connectors, the term OTG is replaced
with the name Dual Role Device (DRD). Like the old USB OTG, a USB-C DRD can change its role
from being a device to be a host and vice versa. The USB OTG receptacle was using the ID pin for
detecting whether a Type-A or Type-B plug is connected in order to know in which role the
communication must start and whether the bus power needs to be provided or not. The USB Type-
C does not feature an ID pin anymore. The detection of the role is done by the two Configuration
Channel (CC) pins.
Figure 18: USB Type-C Block Diagram
The CC pins serve multiple purposes on a Type-C connector. It is used for detecting the orientation
of the connector in the receptacle, negotiating the power delivery (voltage and current), and
negotiating the role of the device. For the CC detection of a DRD port, a port control IC is used.
The TUSB321 can translate the CC detection to a USB OTG ID signal which can be used with the
Verdin module. If the port has negotiated being source for the power (Downstream Facing Port
DFP), the VBUS need to be provided. The TUSB321 can be strapped to announce different current
levels to the device. The over current protection IC on the carrier board needs to be set to a level
that complies with announced current.
The USB 2.0 signals are in the center of the USB Type-C connector. Therefore, the signals of the
top and bottom side of the connector can be connected together without significant stubs. This
means no multiplexer is required if the SuperSpeed signals are not provided to the connector.
GND
100uF
10V
C23
GND
2A
220R@100MHz
L1
GND
1nF
2KV
C25
GND_CHASSIS
USB_1_EN
USB_1_OC#
USB_1_VBUS
USB_1_D_N
USB_1_D_P USB_1_D_CON_N
USB_1_D_CON_P
+V1.8_SW +V1.8_SW
GND
TPS2066CD
EN_1
3
OUT_1
7
OC_1#
8
IC9A
GND
GND_USB_1
GND
1nF
50V
C24
100nF
16V
C22
629105150921
VCC
1
D-
2
D+
3
ID
4
GND
5
S1
S3
S2
S4
X34
GND
GND
100nF
16V
C21
GND
USB_OTG_EN
+V3.3_SW
2
1
6
NTZD3155CT1G
T1A
3
5
4
NTZD3155CT1G T1B
GND
R19
100K
R20
100K
R21
100K
R22
100K
R24
100K
R26
100K
1M
R27
USB_1_ID
TPS2066CD
EN_2
4
OC_2#
5
OUT_2
6
IC9B
TPS2066CD
GND
1
V_IN
2
IC9C
GND
+V5_SW
12R@100MHz
1
2 3
4
L2
USB_1_ID
ESD9101P2T5G
D3
GND
ESD9101P2T5G
D4
GND
ESD9101P2T5G
D5
GND
ESD9101P2T5G
D6
GND
USB_1_EN
155
USB_1_OC#
157
USB_1_VBUS
159
USB_1_D_N
163
USB_1_D_P
165
USB_1_ID
161
USB_2_SSTX_N
169
USB_2_SSTX_P
171
USB_2_SSRX_N
175
USB_2_SSRX_P
177
USB_2_D_N
181
USB_2_D_P
183
USB_2_EN
185
USB_2_OC#
187
X1H
2309409 -2
Verdin Module Carrier Board
USB_1_D_P
USB_1_D_N
USB_1_D_P
USB_1_D_N
RX/TX
US
B
2
.0
O
TG
Con
trol
le
r
USB 2.0/1.1
D+
D-
US
B
H
o
st
/D
ev
ice
USB 2.0/1.1
RX/TX
USB Host/Device USB Type-C Cable
TVS
Diode
US
B
T
ype
-C
R
ece
pta
cl
e
US
B
T
ype
-C
P
lu
g
US
B
T
ype
-C
P
lu
g
U
SB
T
ype
-C
R
ece
pta
cl
e
CC
Config
CC
USB_1_ID
M
o
du
le
C
o
nn
ect
o
r
USB_1_ID CC
Config
CC