MEDIATEK LinkIt Smart 7688 Developer's Manual page 13

Station
Mode
Table 3 Wi-Fi LED blink pattern in LinkIt Smart 7688 HDK
For more information on Wi-Fi Access Point and Station modes, please see section 3.5, "Network
Environment".
2.2.4. Antenna
There are two types of antenna supported on the LinkIt Smart 7688 development board:
Built in Wi-Fi chip antenna, this is the default antenna.
1)
I-PEX connector for external antenna.
2)
To enable the I-PEX connector, you'll need to remove the resistor R233 located on the top
left corner of the I-PEX connector, as circled in Figure 4.
Figure 2 Removing resistor to enable I-PEX connector
2.2.5. USB Host
LinkIt Smart 7688 provides USB host capability that enables it to connect to various USB devices
such as webcams, USB drives, keyboards, joysticks and more. The connector is a USB micro-AB
type. Please see Figure 1 for the USB host connector location.
2.2.6. USB Power
A USB cable connected to a PC or other power source provides a 5V supply to the LinkIt Smart
7688 development board. When you add peripheral devices such as an SD card, USB drive or other
USB device to the development board, additional power may be consumed. Please use a high
quality USB cable to reduce power loss. If your peripheral device consumes power heavily, it's
better to use an external power source for it.
The approximate power consumption of various devices used on the LinkIt Smart 7688 are
described in Table 4. Please see Figure 1 for the USB power connector location.
This document contains information that is proprietary to MediaTek Inc.
Unauthorized reproduction or disclosure of this information in whole or in part is strictly prohibited.
MediaTek LinkIt™ Smart 7688 Developer's Guide
device
Disconnected
Connecting
Connected
© 2015, 2016 MediaTek Inc.
Off
2 blinks per second
Blinking based on the
transmitted data package
Page 13