Could you pls help me to check the connection of unused volatage pins?

System Development
1

Hello , alll,
Nowadays, i supply the sole 1.8V for the LMS7002M, of course , I used the inner LDO, I met a issue that I could not visit the SPI interface from FPGA, I have set the LMS_core_LDO_en=1,LMS_txen=0 and LMS_rxen=0.
we doubted the connection of the unused power pins, we connected the unused the power pins like the screemshot.

7002_power_connection
7002_power_connection.JPG1685×902 290 KB

Could you pls help me to check it? especially the part circled it?

Best Regards!

@martywittrock
@gasparka

2

Sorry, i have no experience with this.

3

Hi @huangdeyong123,

Refer to LimeSDR-Mini 1v1 schematic, where the internal LDOs are used.