LinkIt 7697 HDK v10 User's Guide
© 2015 - 2017 MediaTek Inc.
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configurations; normal mode and recovery mode. To set the HDK to Flash Recovery mode, use the
USR
button to pull up GPIO37. For more details, see section 2.3, “Updating the flash”. Note, that since GPIO37
is in the breakout header, if there is an external component connected to P6 (where GPIO37 is), the
voltage level of that component might affect the boot-up sequence. Ensure P6 is clear or pulled low when
the system powers on.
•
If there is no 5V power source, this HDK can also work with 3.3V by simply connecting the 3V3 pin to a
3.3V power source.
2.2.
Installing the driver for Windows
LinkIt 7697 HDK connects to your computer through the COM port interface. The COM port interface is provided
by the on-board CP2102N USB-to-UART bridge chipset, which then connects to the UART0 port of the MT7697
chipset. The UART0 port can be used to program the flash memory attached to the MT7697 chipset. It can also be
used as a communication channel for your application through terminal emulator program of your choice.
The block diagram for the communication is shown in
Figure 3:
Arduino IDE
CP2102N
Driver
PC
Micro-USB
Connector
CP2102N
Flash Memory
MT7697 SOC
LinkIt 7697 HDK
UART0
Figure 3. Communication between PC and the HDK
Since the board relies on CP2102N to provide the COM port functionality, you'll need to install a driver so that your
computer can recognize it. And because the board uses the default USB VID and PID of the CP2102N, it’s required
to install
the official CP2102N driver
from the vendor's website.
After choosing the
Download VCP
option according to your operating system version and finishing the driver
installation, use a micro-USB cable to connect the board to your computer. The onboard PWR LED should light up.
Follow the steps below to confirm the driver is properly installed:
•
Open
Device Manager
from the control panel.
•
In the
Ports (COM & LPT)
section, an item named
Silicon Labs CP210x USB to UART Bridge
(
COMnnn
)
should appear. The port number can be different on each computer. This is the COM port you'll be using
to program and interact with the LinkIt 7697 HDK (see Figure 4).
Summary of Contents for LinkIt 7697 HDK
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