Dear sir ,
We want to use Nano interface to Silicon lab FXO IC ( Si3050 ) , it requires SPI / PCM , below is my question :
(1) Can Nano’s SPI I/O voltage change to 3.3V ?
(2) Can Nano support PCM interface ?
BR
Wayne
Hi, SPI is only 1.8V on Nano, it might need external level shift to change to 3.3V. Regarding PCM, do you mean if I2S support PCM? I2S supports PCM on Nano.
Hi , Trumany
Please help list the pin define of Nano carrier board for PCM :
(1) PCLK
(2) DTX
(3) DRX
(4) /FSYNC
BR
Please refer to chapter Audio of OEM DG for I2S related info.