User's Manual

MediaTek LinkIt™ Smart 7688 User Manual
 Wi-Fi
Wi-Fi LED is in orange color and its blink pattern is described in Table 7 .
Table 7 Wi-Fi LED blink pattern in LinkIt Smart 7688 Duo
1.4.4. Antennas
LinkIt Smart 7688 Duo has the same antenna support as LinkIt Smart LinkIt
Smart 7688. Please refer to 1.3.4”Antenna” for details.
1.4.5. USB Host
LinkIt Smart 7688 provides USB host capability which enables it to connect
to different USB devices such as webcams, USB drives, keyboards, joysticks
and more. The connector used is USB Micro-AB type.
1.4.6. USB Power
The USB cable provides 5V steady power source to LinkIt Smart 7688 Duo
development boards. When you add peripheral devices such as SD card, USB
drive or other USB devices to the development board, additional power may
be consumed. Please use a proper 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 connected to LinkIt
Smart 7688 Duo is described in Table 8.
Scenario
Approximate
Power
Consumption
To establish Wi-
Fi connection
Peak
596.4 mA
Average
273.5 mA
Device boot up
Peak
672.6 mA
Average
248.9 mA
Downloading file
to a SD Card via
Wi-Fi
Peak
605.4 mA
Average
300.4 mA
Mode
Status
LED blink pattern
AP Mode
With client
device
3 blinks in 1 second
and pause for 0.5
seconds (cycle
repeats)
Without client
device
Off
Station
Mode
Disconnected
Off
Connecting
2 blinks in 1 second
Data
transmission
Blinking based on
the transmitted data
package
© 2015, 2016 MediaTek Inc.
Page 14 of 38
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