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CCS/TMS320F28335: how to get value of SPIBRR

Joshi
Intellectual 630 points

Part Number: TMS320F28335

Tool/software: Code Composer Studio

I am using the TMS320f28335 with spi communication[eeprom-25v02s],I am not getting the value of which value I have to take for SPIBRR?
in below formula which valueI have to put into LSPCLK,if my eeprom has 40mhz frequency.plz pyt suggestion

SPICLK signal =LSPCLK / (SPIBRR + 1)  ...........SPIBRR = 3 to 127

SPICLK signal =LSPCLK/4,................,SPIBRR = 0, 1, or 2

  • 0
    Guru 30330 points
    Mahesh,

    If the F28335 LSPCLK is set to 40Mhz, the maximum SPICLK possible is 10 MHz if SPIBRR is set to 0, 1, 2, or 3. (40 MHz/4). after that the SPICLK is equivalent to LSPCLK/(SPIBRR + 1). For example, if SPIBRR is set to 7, SPICLK will be 5 MHz (40 MHz / (7 + 1)).

    I am not quite sure any other way to explain this. The User Guide provided the formulas that you shared which are correct and very simple.

    Thanks,
    Mark