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MSP430F6726 SPI STE pin

Calum Mackinnon
Genius 4155 points
Other Parts Discussed in Thread: MSP430F6736

We have need of a 4 wire SPI bus and the MSP appears to have it except I don’t know what pin the STE signal goes to. We will likely act as a slave, but the project definition is not yet complete. I seem PM_UC…STE listed in the port mapping, but have found the pin.  Where does it go?

  • 0
    TI__Expert 8560 points

    Hi Calum,

    The MSP430F6736 has more secondary pin functions than it has pins, so we added in a port mapping feature to allow you to route these additional functions out to any available pin on one of the IO ports.  See page 27 of the datasheet for a table showing what functions are available.  So, for example, to route the PM_UCA0STE signal to pin 1.0, you would use the table to write the correct value into the P1MAP0 register (port 1, map pin 0).  So, P1MAP0 = 4.  To put it on P2.5, it would be P2MAP5 = 4.

    If you look in the MSPWare examples for the 673x, there are some examples showing how to set these up.

    John

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