Texas Instruments CC2520, Руководство пользователя

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If the jumper is in the LCL position (short circuiting pin 1 and 2), the board is powered from a
different source, and the FET uses that as input for correct voltage level conversion of the
JTAG signals.
The default jumper setting is LCL.
8.2 BSL or UART connector
The BSL/UART header enables support for accessing and using the Boot Strap Loader
features of the MSP430.
Figure 22 - BSL or UART selection jumpers
Default position is UART, routing UART signal (RX, TX, CTS and RTS) to the UART RS232
connector on the EB.
If BSL is selected, the necessary signals (BSL RX, BSL TX, RST and TST) can be accessed
from the CC2511. Custom software can be implemented to use the features. It is also
possible to connect an external cable to access the BSL.
Please refer to application reports www.ti.com/lit/slaa089 and www.ti.com/lit/slaa096 for
further details.
8.3 SPI Modes
The CCMSP-EM430F2618 board supports two major SPI modes and a third mode that
enables a particular “bypass” mode. The SPI mode is selected with jumpers on header P9.
Figure 23 - SPI Mode selection header
8.3.1 SPI Mode 1 (SPI_M1)
This is the default SPI mode and uses two separate SPI busses. One is dedicated for
communication with the EM module and the other is dedicated to all the SPI devices on the
EB. The MSP430 uses the internal serial interface USCIB1 for the EM and USCIB0 for the
EB. Se figure below for details.