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RM44L520: Driver example for Half-Duplex SPI?

Audun Knudsrod
Intellectual 300 points
Part Number: RM44L520
Other Parts Discussed in Thread: HALCOGEN

Hi, are there any code examples for how to operate the Hercules SPI peripherals in half-duplex mode?

Also:

In the TRM, (document spnu608, chapter 25.2.17), there is a section on Half Duplex Mode.
There is a sentence I do not understand:

****
But this will require that both SOMI and SIMO lines are bonded out in a chip to be able to support
both TX-only or RX-only features.
****

What does it mean by "bonded out"? Does it mean that both pins still has to be physically connected to something on the outside of the MCU? If so, what?

  • 0
    TI__Guru 59540 points

    Hello Audun,

    I am not aware of any examples that exist and it appears as though the half duplex option is not included in halcogen.

    Audun Knudsrod said:
    But this will require that both SOMI and SIMO lines are bonded out in a chip to be able to support
    both TX-only or RX-only features.

    When we discuss a feature being "bonded out" it means that the feature is brought to a pin (i.e., there is a bond wire between the pad on the silicon die to the leadframe which is essentially the pin.)  Note that this is qualified as if it is desired that BOTH TX-only and RX-Only features are supported.