Olimex Open Source Hardware Embedded ARM Linux Single board computer with dual core, dual GPU ALLWINNER A20 CORTEX-A7 A2 A20-OLinuXino-MICRO 数据表
产品代码
A20-OLinuXino-MICRO
OLIMEX© 2013
A20-OLinuXino-MICRO user's manual
The connector can interface standard 3.5 mm phone connector (also known stereo plug or audio
plug).
plug).
The default audio output is set to the HDMI connector (for displays and monitors with built-in
audio speakers). If you wish to use audio out you need to first disconnect the HDMI, boot the board,
connect the audio out device (speakers) and finally connect the HDMI.
audio speakers). If you wish to use audio out you need to first disconnect the HDMI, boot the board,
connect the audio out device (speakers) and finally connect the HDMI.
6.5 USB_OTG connector
The part of the schematic related to the USB_OTG is shown below:
The USB_OTG features Low Loss Power Distribution Switch SY6280 which protects the board in
case the devices you have plugged to the USB_OTG attempt to draw more current than 523mA
combined. The maximum current available on the 5V USB_OTG is exactly 523mA.
case the devices you have plugged to the USB_OTG attempt to draw more current than 523mA
combined. The maximum current available on the 5V USB_OTG is exactly 523mA.
The SY6280 responsible for the USB_OTG is enabled by USB0-DRV (processor pin C12), thus the
USB_OTG is also controlled by the same signal.
USB_OTG is also controlled by the same signal.
USB_OTG connector
Pin #
Signal name
Processor pin
1
+5V_OTG_PWR
-
2
UDM0
N20
3
UDP0
N21
4
USB0-IDDET
B5
5
GND
-
The connector case is also grounded.
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