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LAUNCHXL2-RM57L: SDI with RM57

Martin Valencia
Guru 15175 points
Part Number: LAUNCHXL2-RM57L


Good morning

I have a great doubt, reviewing the user manual of the RM57L, found that it has a type of communication "2-Data Line Mode".

which I would like to take advantage of to communicate with a 23LC1024 RAM memory brand Microchip.

Previously, I already communicated normally, only now to gain speed I would like to use the SDI memory mode.

have problems with understanding the connection of the external pins.

Best Regards

Martin Valencia

  • 0
    TI__Guru**** 198766 points

    Hi Martin,

    As the TRM says that in 2-data line mode (master mode) the shift register bits 15 and 7 will be connected to the pins SIMO[1] and SIMO[0], and the shift register bits 8 and 0 will be connected to the pins SOMI[1] and SOMI[0]. If you use SPI parallel mode, you have to swizzle the data to meet the communication protocol of SDI mode of 23LC1024.

    SDI mode protocol: