Jumper table
Freedom Board for Kinetis K28F (FRDM-K28F), User's Guide, Rev. 0, 04/2017
20
NXP Semiconductors
20. Arduino compatibility
The I/O headers on the FRDM-K28F board are compatible with the peripheral boards (known as
shields) that connect to the Arduino and Arduino-compatible MCU boards. The outer rows of pins (the
even numbered pins) on the headers share the mechanical spacing and placement with the I/O headers
on the Arduino Revision 3 (R3) standard.
21. Jumper table
The following table shows the available jumper options on the FRDM-K28F board. The default jumper
settings are shown in
bold
.
Table 8. FRDM-K28F jumper table
Jumper
Option
Setting
Description
J5
Reset push-button bypass
1-2
Reset button connected to OpenSDA
J7
SWD_CLK
1-2
OpenSDA SWD_CLK isolation jumper
J8
SWD_DIO
1-2
OpenSDA SWD_DIO isolation jumper
J9
OpenSDA reset
DNP*
OpenSDA reset isolation jumper (*shorted on board)
J10
SDRAM supply
DNP*
Measurement point for the SDRAM supply (*shorted on board)
J11
OpenSDA power
DNP*
Isolate the power to the OpenSDA circuit (*shorted on board)
J13
USB host
1-2
OFF host power disable
ON host power enable
J14
VBUS
1-2
USB1_VBUS isolation
J15
VDDIO_E supply
1-2
Measurement point for the K28 VDDIO_E (1.8 V) power domain
J16
QuadSPI supply
DNP*
Measurement point for the QuadSPI supply (*shorted on board)
J17
SWD_CLK
DNP*
Isolate the SWD_CLK from the SWD header (*shorted on board)
J18
VDD supply
1-2
Measurement point for the K28 VDD (1.8 V or 3.3 V) power domain
J20
VDD selection
1-2
2-3
VDD domain is 3.3 V
VDD domain is 1.8 V
J21
VBAT supply
DNP*
Isolate the VDD_VBAT (*shorted on board)
J22
VDD CORE supply
1-2
Measurement point for the K28 VDD (1.2 V) power domain
J25
5V DC support
DNP
Optional 5 V regulator
J26
P3V3_VREG protection
DNP*
Enable the diode protection when using an external supply on P3V3
(*shorted on board)
J53
USB HS and FS selection
1-2
OFF USB HS
ON USB FS
J54
USB host power selection
1-2
2-3
From the SDA circuit
From the 5 V regulator
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