MEDIATEK LinkIt Smart 7688 Developer's Manual page 21

Scenario
grades firmware
from a USB drive
Upgrades boot
loader from a USB
drive
WARNING: Restore
to default setting
and all user data
will be removed
from the device
Table 6 LinkIt Smart 7688 Duo Development board buttons
2.3.3. LEDs
LinkIt Smart 7688 Duo has the same power and Wi-Fi LEDs as the LinkIt Smart 7688 development
board. Please see section 2.2.3, "LEDs" for detailed information. In addition to the power and Wi-Fi
LEDs, the LinkIt Smart 7688 Duo also has a LED that is tied to pin D13. D13 LED is controlled by the
user Arduino program..
2.3.4. Antennas
LinkIt Smart 7688 Duo has the same antenna support as LinkIt Smart 7688. Please refer to section
2.2.4, "Antenna" for details.
2.3.5. 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 9 for USB host connector location.
2.3.6. USB Power
A USB cable connected to a PC or other power source provides a 5Vsupply to LinkIt Smart 7688
Duo development board. When you add peripheral devices such as an SD card, USB drive or other
USB devices 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. Please see Figure 9 for USB Power connector
location.
The approximate power consumption of various devices connected to the LinkIt Smart 7688 Duo
is described in Table 7.
Scenario
To establish Wi-Fi
connection
Device boot up
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
Button
Wi-Fi Reset Button
Wi-Fi Reset Button
Peak
Average
Peak
© 2015, 2016 MediaTek Inc.
Action
While the board is
powering up, press
the button for at
least 5 seconds and
release
While the board is
powering up, press
the button for at
least 20 seconds and
release
Approximate
Power
Consumption
596.4 mA
273.5 mA
672.6 mA
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