Configuration Settings; Jumper / Switch Settings - NXP Semiconductors TWR-RF-SNAP User Manual

4 Configuration Settings

4.1 Jumper / Switch Settings

There are several jumpers provided for isolation, configuration, and feature selection. Refer to the
following table for details.
Jumper Options
TWR-ELEV
J5 Connection
Jumper
3-Position
Switch 1
Power Switch
Switch 2 Push Button
Switch 3 Push Button
Switch 4 Push Button
Setting
1-2 I2C SCL - Connects I2C_SCL to TWR-ELEV
3-4 I2C SDA - Connects I2C_SDA to TWR-ELEV
5-6 UART RX - Connects UART1_TXD to TWR-ELEV (ELEV_RXD0)
7-8 UART TX - Connects UART1_RXD to TWR-ELEV (ELEV_TXD0)
9-10 SPI MISO - Connects SPI_MISO to TWR-ELEV
11-12 SPI MOSI - Connects SPI_MOSI to TWR-ELEV
13-14 SPI CS - Connects SPI_SS to TWR-ELEV
15-16 SPI CS - Connects SPI_SS to TWR-ELEV
17-18 SPI CLK - Connects SPI_SCLK to TWR-ELEV
19-20 RESET - Connects RESET to TWR-ELEV
Left Powered via Battery Terminal: Switched towards battery connection
Center OFF
Right Powered via USB / Tower System : Switched towards USB receptacle
Switch connects SM700 GPIO 22 to GND when pressed. Pin can be used as
Pressed
an interrupt pin to wake the SM700 from sleep.
Switch connects SM700 GPIO 23 to GND when pressed. Pin can be used as
Pressed
an interrupt pin to wake the SM700 from sleep.
Pressed Resets the SM700
TWR-RF-SNAP User's Manual
Description
(ELEV_SCL0)
(ELEV_SDA0)
(ELEV_SPI0_MISO)
(ELEV_SPI0_MOSI)
(ELEV_SPI0_CS0)
(ELEV_SPI0_CS1)
(ELEV_SPI0_CLK)
(ELEV_RSTOUT_B)
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