MediaTek LinkIt™ Smart 7688 Developer's Guide
© 2015, 2016 MediaTek Inc.
Page 15
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.
2.2.8.
JTAG
You can use the JTAG interface to debug MT7688AN. To access the JTAG interface, you‘ll need to
unsolder resistor R95 and solder it to resistor R3 on the development board. After you’ve moved
the resistor and reboot the device you can activate the JTAG function. The hardware configuration
steps are:
1)
Find the group of resistors on the bottom of LinkIt Smart 7688 in the upper-right, as
circled in Figure 4.
Figure 4 JTAG resistors on the bottom of the LinkIt Smart 7688
2)
Move a resistor by unsoldering and soldering it to a lower position as shown in Figure 5,
after you’ve finished moving the resistor, restart the device and you should be able to
activate the JTAG function.
Figure 5 Moving a resistor to access JTAG mode
2.2.9.
Specifications
The key specifications of the LinkIt Smart 7688 development board are shown in Table 5.
Category
Feature
Specification
MPU
Chipset
MT7688AN
Core
MIPS24KEc
Clock speed
580MHz
