Freescale Semiconductor SM700, Быстрый старт

Страница: 7 / 8

TOWER SYSTEM Featuring the SM700 RF Engine from Synapse
TWR-RF-SNAP Jumper Options
The following is a list of all jumper options.
Jumper Option Setting Description
J5
TWR-ELEV
Connection
Jumper
1-2 I
2
C SCL : Connects I
2
C_SCL to TWR-ELEV (ELEV_SCL0)
3-4 I
2
C SDA : Connects I
2
C_SDA to TWR-ELEV (ELEV_SDA0)
5-6 UART RX : Connects UART1_RXD to TWR-ELEV (ELEV_RXD0)
7-8 UART TX : Connects UART1_TXD to TWR-ELEV (ELEV_TXD0)
9-10 SPI MISO : Connects SPI_MISO to TWR-ELEV (ELEV_SPI0_MISO)
11-12 SPI MOSI : Connects SPI_MOSI to TWR-ELEV (ELEV_SPI0_MOSI)
13-14 SPI CS : Connects SPI_SS to TWR-ELEV (ELEV_SPI0_CS0)
15-16 SPI CS : Connects SPI_SS to TWR-ELEV (ELEV_SPI0_CS1)
17-18 SPI CLK : Connects SPI_SCLK to TWR-ELEV (ELEV_SPI0_CLK)
19-20 RESET : Connects RESET to TWR-ELEV (ELEV_RSTOUT_B)
Switch 1
3-Position
Power Switch
Left
Powered via Battery Terminal: Switched towards battery
connection
Center OFF
Right
Powered via USB / Tower System : Switched towards USB
receptacle
Switch 2
User
Push Button
Pressed
Switch connects SM700 GPIO 22 to GND when pressed. Pin can
be used as an interrupt pin to wake the SM700 from sleep.
Switch 3
User
Push Button
Pressed
Switch connects SM700 GPIO 23 to GND when pressed. Pin can
be used as an interrupt pin to wake the SM700 from sleep.
Switch 4 Reset Button Pressed Resets the SM700