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MSP430F67661A: How to connect Flash memory to MSP432E401YTPDTR?

Praveen N1
Intellectual 420 points
Part Number: MSP430F67661A

Hi Team, 

1. Currently, We are working on PN: MSP432E401YTPDTR. We plan to incorporate an SPI flash into our configuration. However, the MSP does not have a designated provision for an SPI interface; instead, it offers SSI communication. Are there alternative methods for integrating flash memory into the MSP430?

2. In the case of using SSI, what is the procedure for connecting it to the flash memory? Pin configuration will differ.

Is there any application note kindly share it. 

  • 0
    TI__Guru 56685 points

    Praveen,

    I'm not sure I understand your issue. The MSP430F67661A has 6 USCI modules, all of which can provide a SPI interface. The dedicated Chip Selects (CS) for the device is a particular form of SPI that is to normally used. The general solution for MSP430 devices, it to utilize a GPIO and manually control your CS that way. 

  • 0 in reply to Jace H
    Intellectual 420 points

    Dear Jace H, 

    Thanks for your response. 

    Apologies for the confusion earlier. I was referring to the MCU with the part number PN: MSP432E401YTPDTR, which includes SSI modules.

    We plan to incorporate an SPI flash into our configuration. However, the MSP does not have a designated provision for an SPI interface; instead, it offers SSI communication. Are there alternative methods for integrating flash memory into the MSP430?

    In the case of using SSI, what is the procedure for connecting it to the flash memory? Pin configuration will differ.

  • 0 in reply to Praveen N1
    Guru 90870 points

    The SSI in "Legacy" mode is SPI. MOSI/MISO are DAT0/1 respectively [Ref TRM (SLAU723A) Sec 23.3.2.1/2]. There is a built-in Chip Select (Fss), but (echoing Jace above) I don't recommend using it.

    The SSI is also capable of QSPI, but I haven't tried that.

  • 0 in reply to Bruce McKenney47378
    Intellectual 420 points

    Dear Bruce,

    Thanks for your reply; I'm a bit confused. Are you not recommending using SSI for SPI or using GPIO as Chip Select, as suggested by Jace?

    Do you have any other recommendations for including an SPI flash in the MSP432E401YTPDTR?

  • +1 in reply to Praveen N1
    Guru 90870 points

    Yes, you should use the SSI (in Legacy mode) for SPI. No, I don't recommend using the Fss feature -- rather use a GPIO for the Chip Select.

    I don't recall any other concerns -- things worked as expected.

  • 0 in reply to Bruce McKenney47378
    Intellectual 420 points

    Dear Bruce, 

    Thanks for your valuable input. 

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