Part Number: CC1101CC1190EMK868
Hello TI-community!
I have a Problem with my CC1101-CC1190 Evaluation Module Kit. I try to build up a communication between a CC1101 as a transmitter and a CC1101 and CC1190 range extender as a receiver.
The receiving module is connected to a raspberry pi Zero.
The communication between two CC1101 worked fine, so I wanted to add the CC1190 to improve the range of my receiver. Due to the customer the transmitting configuration should not be changed.
I ordered the evaluation kit to use the TI reference design directly and replaced my receiving CC1101 with the evaluation kit.
Like the CC1101 it is connected to the raspberry over an SPI Interface and gets 3.3 V supply voltage from it.
I did not change my working configurations from my proper CC1101, but now the received Signal is much weaker than before. My RSSI value is around -79dbm directly next to the Transmitter,
so I guess my CC1190 is not working properly.
My HGM pin is hardwired to VDD, my PA_EN is set low and my LNA_EN is set high.
For PA_EN and LNA_EN I already tried different ways on pulling them to the desired value.
I used the GDO0 and GDO2 pin of the CC1101, hardwired both to GND or VDD respectively and tried to set them with two GPIOS of the raspberry, but I always get the same result. I measured the voltage at the CC1190 pins and in every try the PA_EN is on 0V and LNA_EN on 3,3V, like desired.
The three supply voltage Pins are also on 3.3V. I read that the bias pin should be on 1.5V as a sign that the chip is working properly. I measure 0.07V there, but I have no more ideas what could be wrong in my configuration. I connected the kit to my raspberry with the CC1101_CC1190EM-Schematic and have no TI-development kit at hand.
If someone has an idea, it would save my day!
Best regards
Marcel Kettelgerdes
