As CON3 and CON4 share the same signal lines they cannot both be used at the
same time. Please be sure to use only one of the connectors.
5.6. CON5, CON6 (USB Interface)
CON5 is a USB interface connected to a USB controller in the i.MX257. Although the lower port of CON5 and CON6
have differing connector types and pin layouts, they share the same USB signal lines.
It is possible to select between the power in (VIN) of CON12 (or CON13) and the +5V power generated by the power
management IC (PMIC) as the source of power provided to USB devices from CON5 and CON6 by controlling
[3]
the
NFWE_B (GPIO3_26) pin on the i.MX257. When using a power input of less than 4.75V while connecting USB devices,
please select the PMIC gen5V power source. Please be aware that the total maximum current that can be supplied
to the two USB channels is 300mA when using the PMIC gen5V power source.
[4]
CON5 Upper Port:
• Data transmission modes: USB 2.0 Full Speed (12Mbps), Low Speed (1.5Mbps)
• Controller: i.MX257 internal USB controller (HOST)
• PHY: i.MX257 internal USB PHY (USBPHY2)
CON5 Lower Port, CON6:
• Data transmission modes製USB 2.0 High Speed (480Mbps), Full Speed (12Mbps), Low Speed (1.5Mbps)
• Controller: i.MX257 internal USB controller (OTG)
• PHY: i.MX257 internal USB PHY (USBPHY1)
5.10 CON5 Signals
Pin Number
Signal Name
I/O
Function
1
+5V_USB
Power
Selection between USB power and power in VIN (when above 4.75V)
providing for a max 500mA supply
2
USB1-
In/Out
USB1 minus side signal, i.MX257 USBPHY1_DM pin
connection, signal line shared with CON6 (pin 2)
3
USB1+
In/Out
USB1 plus side signal, i.MX257 USBPHY1_DP pin
connection, signal line shared with CON6 (pin 3)
4
GND
Power
Power (GND)
5
+5V_USB
Power
Selection between USB power and power in VIN (when above 4.75V)
providing for a max 500mA supply
6
USB2-
In/Out
USB2 minus side signal,
i.MX257 USBPHY2_DM pin connection
7
USB2+
In/Out
USB2 plus side connection,
i.MX257 USBPHY2_DP pin connection
8
GND
Power
Power (GND)
[3]
The power in (VIN) source will be used when the NFWE_B (GPIO3_26) pin is low, and the power management IC gen5V will be used when
the pin is high.
[4]
Please refer to 製5.18. Power Circuit Make-up製 for the power circuit make-up.
Armadillo-400 Series Hardware Manual
Interface Specifications
22
