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Quick Start Guide
TWR-K64F120M Jumper Options
The following is a list of all jumper options on the TWR-K64F120M. The default installed
jumper settings are indicated in the shaded boxes.
Jumper
Option
J33
50 MHz Clock
OSC Power
J32
JTAG Board
Power
J14
Selection
UART4_TX
J36
UART4_RX
J27
SDHC_WP /
J34
UART4_RTS_B
GPIO3_ELEV
J35
UART_CTS /
RTC_CLKOUT/
J31
1588_CLKIN
TAMPER0
J21
6
Setting
Description
1–2
Enable V_BRD power supply to 50 MHz OSC
1–2
Disable V_BRD power supply to 50 MHz OSC
Connect 5 V output (P5V_TRG_USB) to JTAG port (supports
ON
powering board from JTAG pod supporting 5 V supply output)
OFF
Disconnect JTAG 5 V output (P5V_TRG_USB) from JTAG port
ON
Connect PTE24 as UART4_TX to Secondary TWR_ELEV
OFF
Disconnect PTE24 as UART4_TX to Secondary TWR_ELEV
ON
Connect PTE25 as UART4_RX to Secondary TWR_ELEV
OFF
Disconnect PTE25 as UART4_RX to Secondary TWR_ELEV
Connect PTE27 as UART4_RTS_B to Secondary TWR_ELEV or as
ON
SDHC_WP to SD card slot as write protect signal
Disconnect PTE27 as UART4_RTS_B to Secondary TWR_ELEV or
OFF
as SDHC_WP to SD card slot as write protect signal
ON
Connect PTE28 as General-Purpose I/O to TWR_ELEV
OFF
Disconnect PTE28 as General-Purpose I/O to TWR_ELEV
Connect PTE26 as UART_CTS to Secondary TWR_ELEV or as
ON
RTC_CLKOUT to primary TWR_ELEV or as Clock input for 1588
Disconnect PTE26 as UART_CTS to Secondary TWR_ELEV or as
OFF
RTC_CLKOUT to primary TWR_ELEV or as Clock input for 1588
ON
OFF
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