Texas Instruments SWRU294, User Manual, Page: 31 / 57

SWRU294
Page 31/40
8 Using SmartRF Studio with combo EMs
and SmartRF TrxEB
SmartRF Studio does not support controlling combo evaluation modules (e.g. CC1120/CC1190)
mounted on SmartRF TrxEB revisions 1.3.0 and 1.5.0 out of the box. The USB MCU on these EB
revisions does not have access to sufficient signals for SmartRF Studio to control such EM
boards.
In order to use these EB revisions with a combo EM and SmartRF Studio, three signals must be
strapped manually. The signals that must be strapped are listed in Table 14 and the strapping is
illustrated in Figure 21. Always remember to power off the SmartRF TrxEB before strapping
signals.
After strapping these three signals, combo EMs can be used together with SmartRF Studio and
SmartRF TrxEB!
EM board signal Strapping (MSP430 I/O breakout)
HGM (High Gain Mode) P3.5 P5.6
PA_EN (Power Amplifier Enable) P3.4 P2.7
LNA_EN (Low Noise Amplifier Enable) P1.4 P5.7
Table 14
– Signal strapping for SmartRF Studio combo EM support on SmartRF TrxEB
PA_EN
LNA_EN
HGM
Figure 21
– Signal strapping for SmartRF Studio combo EM support on SmartRF TrxEB
EM
Connectors
USB
MCU
MSP430
MCU
Added strapping lines
Figure 22
– Block diagram for SmartRF Studio combo EM support on SmartRF TrxEB
NOTE: Additional configuration may be required on the combo EM board. Please refer to the
schematics of your combo EM for more details.