The 1K x 8 SRAM holds stack and small buffers; the 21 I/O pins on the 28-TSSOP package give enough headroom for a sensor cluster or a simple HMI with a few buttons and LEDs. Internal oscillator keeps the BOM count low — no external crystal needed for the core clock, though the internal oscillator is rated for the 8 MHz speed grade.
The 28-TSSOP package is a surface-mount footprint with 0.65 mm pitch — standard for automated assembly and rework.
Serial connectivity and analog integration
On the digital side, the MSP430FR5720IPW brings I²C, SPI, UART/USART, LIN, and IrDA — enough to talk to common sensors, displays, and industrial bus transceivers without glue logic.