The Uart baud rate generation formula is,
UARTn baudrate = PCLK/16*UnDL
UnDL = 256 × UnDLM + UnDLL
why the Divisor latch MSB is multiplied with 256
plz inform me,
thank you
Didn't you think the datasheet/user manual for the processor contained enough information to answer this question?
If you don't think so, then you have to contact the chip manufacturer, because the people who read your post on this forum doesn't have access to any more documentation than what you can retrieve yourself.
...than what you can retrieve yourself.
In fact, people on this forum don't even have access to that - because you didn't bother to mention what specific chip you are talking about!!