It carries 128 KB of program Flash and 64 KB of SRAM — enough for moderate control and communications stacks without external memory.
For a BOM line that is already qualified, the NRND flag is a signal to evaluate a migration path before a formal EOL notice appears.
Supply voltage and temperature grade — where it runs
That means the board's power supply needs to be a regulated 2.5 V rail, not a generic 3.3 V LDO.
Peripherals and data conversion — what is on-chip
The brown-out detect and POR supervise the supply, and the PWM and WDT suit motor-control and watchdog-supervised applications. The internal oscillator reduces external component count, though a crystal can be added for tighter timing.