Toradex Colibri - Colibri USB Host and Client Modes

Colibri Carrier Board Design Guide
Toradex AG l Altsagenstrasse 5 l 6048 Horw l Switzerland l +41 41 500 48 00 l www.toradex.com l info@toradex.com
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Figure 2: Fast Ethernet with Integrated Magnetics Reference Schematic
2.2.3 Unused Ethernet Signals Termination
All unused Ethernet signals can be left unconnected.
2.3 USB
The Colibri modules feature two USB interfaces. One of the two USB interfaces can be configured
to be used as either the host or client. The other interface can only be used as a host. Some of the
Colibri modules use the USB client port for debugging and recovery purposes. Therefore, it is
recommended to have the interface accessible even for carrier board designs that do not need any
USB ports.
2.3.1 USB Signals
Colibri
Pin
Colibri
Signal Name
I/O
Type
Power
Rail
Description
139
USB_H_DP
I/O
USB
3.3V
Positive Differential Signal for USB Host port
141
USB_H_DM
I/O
USB
3.3V
Negative Differential Signal for USB Host port
143
USB_C_DP
I/O
USB
3.3V
Positive Differential Signal for the shared USB Host / Client port
145
USB_C_DM
I/O
USB
3.3V
Negative Differential Signal for the shared USB Host / Client port
Table 4: USB Data Signals
If you use the USB Host function, you need to generate the 5V USB supply voltage on your carrier
board. The Colibri modules provide two optional signals for USB power supply control (PWR_EN
and OC). We recommend using the following pins to ensure the best possible compatibility.
However, the use of these signals is not mandatory, and other GPIOs may be used instead.
In the USB client mode, an additional signal is required that detects whether the client is connected
to a host interface (VBUS_DETECT). Please note that this pin is only 3.3V tolerant. Therefore, an
additional logic level shifter (the simplest solution is a voltage divider) is required.
Colibri
Pin
Colibri
Signal Name
I/O
Type
Power
Rail
Description
129
USB_H_PWR_EN
O
CMOS
3.3V
This pin enables the external USB voltage supply. By default, this
pin is active low.
131
USB_H_OC
I
CMOS
3.3V
USB overcurrent, this pin can signal an overcurrent condition in the
USB supply
137
USB_C_VBUS_DETECT
I
CMOS
3.3V
Use this pin to detect if VBUS is present (5V USB supply). Please
note that this pin is only 3.3V tolerant
Table 5: USB Control Signals
ETH_LINK_ACT
ETH_SPEED
ETH_TX 0_N
ETH_TX 0_P
ETHERNET[0..5]
50R
R20
50R
R21
100nF
16VC45
GND
50R
R22
50R
R23
100nF
16VC46
GND
ETH_RX I_P
ETH_RX I_N
C44
100nF
16V
GND
ETH_AVCC
3.3V
3.3V
2A
220R@ 100MHz
L10
47uF
6.3V
+
C4 8
47uF
6.3V
+
C49
3.3V ETH_AVCC
GND
150 RR25
150RR24
J00- 0065N L
TD +
1
TD -
2
CT_TX D
4
CT_RX D
5
RD +
3
RD -
6
LED_Left_ A
9
LED_Left_ C
10
LED_R ight_ C
11
LED_R ight_ A
12
SHIELD
S1
SHIELD
S2
NC
7
CH S GND
8
X17
ETH_LINK_ACT
ETH_SPEED
ETH_TX0_N
ETH_TX0_P
ETH_RXI_N
ETH_RXI_P
1473005 -1
ETH_LINK_ACT
183
ETH_SPEED
185
ETH_TX0-
ETH_TX0+
189
ETH_RXI-
193
ETH_RXI+
195
ETH_GND
191
Colibri - Ethernet
2 of 16
X1B
SHIELD
Ethernet Connector
ETH_CT_TX
ETH_CT_RX
GND
GND
0R
R10
C47
100nF
16 V
GND
0R
R11
0R
R12
NA
PXA2700RNA0R
ModuleR12R11R10
All except PXA2700RNA 0R
Reserved for future modulesNA NANA
(Integrated Magnetics)
187