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MSP430F5419A: Maximum no. serial ports (SPI, UART, I2C)

Dnyandeep Buwa98
Prodigy 10 points
Part Number: MSP430F5419A


We are using MSP430F5419A in one of our product. We are using 7 serial ports (2 UART, 4 SPI, 1I2C). As per datasheet, upto 4 serial ports allowed. However, this limit of 4 for complete MCU or can we use 4 serial ports from USCI_A and 4 from USCI_B port? 

Thanks and best regards,

Dnyandeep

  • 0
    TI__Guru**** 219477 points
    The MSP430F5419A has 8 USCI modules:

    UCA0-UCA3 each support UART and SPI
    UCB0-UCB3 each support I2C and SPI

    The SPI STE and CLK pins are shared between the UCAx and UCBx peripherals but this won't make a difference if you use 3-pin SPI with a GPIO CS pin. You can also drive multiple SPI and I2C devices with a single bus to reduce the number of USCIs required and save pin space.

    Regards,
    Ryan

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