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Suggestion on microcontroller (SPI + ADC + UART separate ports, PDIP)

luca toso
Prodigy 100 points

Other Parts Discussed in Thread: MSP430G2553

Hello,

I am writing because I would like a suggestion about a suitable MSP430 or equivalent.

I need to sample analog data on 4 channels, retrieve digital data from an SPI external device and send my data trough the UART to a computer.

Right now, I have only (a little bit of) experience on msp430g2553, but I know that ADC, SPI (USCI) and UART are on port 1, while port 2 is free and the only perypheral that can access it is the timer (or GPIO pins).
If I could write a software SPI on port 2, I could obviously use a 2553, but It's my *last* resource.
Furthermore, I don't hve a FET debugger or equivalent, so I have to use the launchpad to program an msp; so I'd prefer a PDIP pakage.

Please, could anyone suggest me a suitable micro?

Best regards,

Luca.

  • 0
    Guru 227245 points

    Unfortunately, there aren't many MSPs with PDIP package. Also, the PDIPs have a limited pin count and therefore the peripheral functions are mapped to the few port pins that are available on the smallest package. The larger packages usually only offer a few more GPIO pins (Timer and ADC are the only modules with selectable inputs, all others have a fixed mapping that usually goes to P1)

    You can try your luck with the selector tool on the TI homepage for MSP430. You can filter there for PDIP packages. Be sure the part supports SBW programming.

    Alternatively, you can wire the four programming lines fro the LaunchPad jumpers to the target processor. Keep the wires short and same length. It will allow you to program more or less any 2x family MSP with SBW support.

    Anyway, for serious work, I recommend buying a FET430UIF, which supports every MSP out there.

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