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TRF7970A: Lower pin count MSP430 compatible with the firmware for MSP430F5229

Part Number: TRF7970A
Other Parts Discussed in Thread: MSP430F5224

I am  looking for a lower pin count part that can still run the framework used to develop with the TRF7970A.

I was looking at the MSP430F5224, but would like to go with even a lower pin count.

  • I should add that I will be needing NFC Tag or Card Emulation mode in the future. But for the most part just want to read/write custom formatted TAGs 14443A and B
  • Hello John,

    Pin requirements are pretty minimal for the TRF7970A, just SPI pins, an interruptible GPIO for IRQ and a couple pins to control lines like EN and EN2 (if EN2 is even used). The issue will be firmware size, so you should try and compile the NFC Stack on the F5529 with the modes and features you need enabled (like, do you need USB? If not, cut it out for recompile) and then assess the size of the firmware so your MCU size is sufficient to support future additions.