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14
7
USB_DP3
USB Data+
8
GND
Ground
9
GND
Ground
10
GND
Ground
11
GND
Ground
12
GND
Ground
2.4 USB OTG (J8)
EM3288 OTG is a Micro USB2.0 port, it is used to download image and ADB transfer file.
Feature
* Compatible with USB OTG2.0 specification
*Supports USB 2.0 High Speed (480Mbps), Full Speed (12Mbps) and Low Speed (1.5Mbps) operation in
host mode
*Supports USB 2.0 High Speed (480 Mbps) and Full Speed (12 Mbps) operation in peripheral mode.
*Hardware support for OTG signaling, session request protocol, and host negotiation protocol.
Micro USB
Pin
Signal
Description
Pin
Signal
Description
1
OTG_DET
OTG detection. OTG
5V power supply
2
OTG_DM
OTG data -
3
OTG_DP
OTG data+
4
OTG_ID
OTG ID indicator
5
GND
Ground
6
GND
Ground
7
GND
Ground
2.5 Micro SD (J1)
The Micro SD card is used as an external storage device. The MMC controller interface supports up to
4-bit transfer modes. MMC is always accessible through the carrier board interface. It does not support
hot-plug.