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RM48L952: Is it possible to connect 2 SOMI pins to one SPI interface?

Part Number: RM48L952
Other Parts Discussed in Thread: ADS8355, TIDA-00176, ADS8354


I want to use ADS8355IRTET with RM48L952. 

The ADS8355 has an SPI interface with two outputs, one for channel A and one for channel B data. How can I connect it to the RM48L952?

If it's not possible to use 2 SOMI pins on the RM48, then I know I can use only one pin for both channels.

ADS8355 datasheet:
Reference design for TIDA-00176 which uses ADS8354:

RM48x reference manual:
RM48L952 datasheet:

Best regards,


  • Hi Matteo,

    RM48 does support SI parallel mode. But the data format in parallel mode is a little complex. 

    1. In parallel mode, the data length has to be 16-bit

    2. For 2 line mode (2 SOMI, and 2 SIMO), data bit [15:8] is from SOMI[1] pin, and data bit [7:0] is from SOMI[0] pin. Data[15:8] is transmitted on SIMO[1] pin, and data[7:0] is transmitted on SIMO[0] pin.

    Just read ADS8355 datasheet, the parallel mode doesn't work for ADS8355.