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SWRU294
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6 SmartRF Transceiver Evaluation Board Overview
SmartRF TrxEB acts as the motherboard in several development kits for Low Power RF ICs from
Texas Instruments. The board has several user interfaces and connections to external interfaces,
allowing fast prototyping and testing of both software and hardware.
This chapter will give an overview of the general architecture of the board and describe the
available I/O. The following sub-sections will explain the I/O in more detail. Pin connections
between the evaluation board I/O and EM can be found in section 6.10.
EM
Serial
Flash
LCD
USB
LED
Buttons Accelerometer
Light
Sensor
JTAG
debug
USB
MSP430F5438A
controller
USB Controller
(CC2511)
UART
Alternative SPI (USCIB1) / UART (USCIA0)
SPI (USCIB0)
UART (1.6.0+ only)
GPIO
SPI (USCIA2)
SPI (USCIB2)
LEDs
Figure 3
– SmartRF TrxEB architecture
6.1 USB MCU
The USB MCU is the CC2511F32 from Texas Instruments. Please see the CC2511 product page
[3] on the TI web for detailed information about this controller. The recommended operating
condition for the CC2511 is a supply voltage between 3.0 V and 3.6 V. The min (max) operating
temperature is 0 (+85)
˚C.
The USB controller is programmed with a bootloader and the standard SmartRF TrxEB firmware
when it is shipped from the factory. A flow chart over the USB MCU bootloader and standard
firmware is shown in Figure 4.
NOTE: Signal names
used in this user’s guide and in the SmartRF TrxEB schematics, are
named “as seen” from the onboard MSP430 MCU. E.g. signal name “P1_3” refers to the
signal connected to MSP430 port 1, pin 3.