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5.3.6
XE1401 UART Interface (JP11)
JP11 provides the possibility to interface the XE1401 UART interface without going through the RS232 level-shifter.
Removing the jumpers JP11 disconnects the UART RX and CTS lines from the RS232 level shifter and allows to
directly accessing the XE1401 UART via JP2.
5.3.7
Protection Diode CR6 Bypass (JP12)
The protection diode CR6 can be bypassed by shorting JP12 to avoid any voltage dropout when using an
application board connected through JP2. If CR6 is bypassed the XE1401SK becomes unprotected against reverse
voltage coming from an external application board.
© Semtech 2006
19
Users Guide
XE1401SK Hardware
www.semtech.com
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