SBC-A62-J
SBC-A62-J User Manual - Rev. First Edition: 1.0 - Last Edition: 2.3 - Author: S.B. - Reviewed by N.P. Copyright © 2016 SECO S.r.l.
27
3.3.6
USB ports
The i.MX6 family of processors offer a native USB 2.0 Host port and a USB 2.0 OTG interface. Depending on the factory option purchased, the SBC-A62-J board
can be equipped with a SMSC USB2514 USB 2.0 Hi-Speed Hub Controller, so that the total amount of USB 2.0 Host ports can be four instead of the native one
only.
Lined to the ETHERNET connector, there is a double USB connector, CN6, which is a
standard double USB Type A socket, shielded.
This connector can carry out the i.MX6 native USB 2.0 Host port, or the USB ports #1 and
#2 coming out from theoptional SMSC USB2514 USB 2.0 Hi-Speed Hub Controller.
Since this connector is a standard type-A receptacle, it can be connected to all types of USB
1.1 / USB 2.0 devices using standard-A USB 2.0 plugs.
Signals description:
/USB_P1-: USB Port #1 differential pair; it can be the i.MX6 native USB 2.0 Host port or it can be
managed by optional SMSC USB2514 Hub controller
’
s Downstream Port #1.
/USB_P2-: USB Port #2 differential pair; it is managed by SMSC USB2514 Hub controller
’
s Downstream Port #2 (when available).
+5V
USB1
and +5V
USB2
voltages are derived from +5V_SB power rail through two dedicated 500mA fuses.
The USB 2.0 Port #3 of the same optional USB hub is carried to an internal female pin Header, located on the bottom
of the board, which is intended for the connection of optional WiFi module (obviously, it can also be used as a standard
USB2.0 port).
Pin Header is a standard 7-pin p 2.54 mm female header, h=4.5mm.
Please notice that this optional connector can be offered with two independent pinouts,
depending on the optional USB Wi-Fi module that will be used (the pinout is shown in the table on the left).
Signals description:
/USB_P3-: USB Port #3 differential pair; managed by SMSC USB2514 Hub controller
’
s Downstream Port #3.
WiFi_TX: WiFi enable output signal, +3P3V_SB electrical level with a 4K7
Ω
pull-up resistor.
WiFi_WPS: WiFi WPS function enable, +3P3V output signal.
Double USB 2.0 type A receptacle -
CN2A1
Pin Signal
Pin Signal
1
+5V
USB1
5
+5V
USB2
2
USB_P1-
6
USB_P2-
3
7
4
GND
8
GND
Optional USB WiFi module
connector - J3
Pin 7-pin WiFi
Module Signal
6-pin WiFi
Module Signal
1
WiFi_TX
N.C.
2
+5V_SB
3
USB_P3-
4
5
GND
6
N.C.
WiFi_TX
7
WiFi_WPS
N.C.
