LinkIt 2523 HDK v11 User's Guide
© 2015 - 2016 MediaTek Inc.
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through the same jumpers, if the JTAG interface is activated. To capture logs by JTAG formal pin assignment
connector, mount 0
Ω
resistors on footprint R9016, R9017, R9018, R9019, R9020, R9021 and R9023, then the
connector CON9002 will be ready for JTAG signal transmission.
Resistors from R9001, R9002, R9007 and R9008 are the strap pins to adjust the feature settings, such as JTAG
debug interface output cluster, as shown in Table 17. LinkIt 2523 HDK also provides the I2C and UART pin headers
to receive system log or connect to external components directly, as shown in Figure 19. Both Figure 14 and Figure
19 provide the detailed locations of the pins.
Table 17. Resistor selections
JTAG function
activated
Mount 10
kΩ
resistors R9002 and R9008 to deactivate the JTAG signals.
Mount 10
kΩ
resistors R9001 and R9007 to activate the JTAG signals through the
GPIO pins in a range from GPIO 24 to GPIO 28 to interface the camera pin
headers.
Mount 10
kΩ
resistors R9001 and R9008 to activate the JTAG signals through the
GPIO of keypad cluster. Apply this setting to activate the MK20 JTAG connector.
Left to Right
I2C pins – SCL0, SDA0
UART pins – UTXD0, URXD0
GND pins – GND, GND