43.25 UART AC Electrical Specifications

Note:

1. These parameters are characterized, but not tested in manufacturing.

2. Operating Mode	Condition	Baud Rate (Bits Per Second)	Baud Register Value Calculation
   Asynchronous arithmetic	$f_{BAUD\le \frac{f_{ref}}{S}}$	$f_{BAUD=\frac{f_{ref}}{S}(1-\frac{BAUD}{65536})}$	$BAUD=65536\mathrm{.}(1-S\mathrm{.}\frac{f_{BAUD}}{f_{ref}})$
   Synchronous	$f_{BAUD\le \frac{f_{ref}}{2}}$	$f_{BAUD\le \frac{f_{ref}}{2\mathrm{.}(BAUD+1)}}$	$BAUD=\frac{f_{ref}}{2\mathrm{.}{f}_{BAUD}}-1$