UM10462 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2016. All rights reserved.
User manual Rev. 5.5 — 21 December 2016 261 of 523
NXP Semiconductors
UM10462
Chapter 12: LPC11U3x/2x/1x USART
12.5.14.1 Baud rate calculation
The USART can operate with or without using the Fractional Divider. In real-life
applications it is likely that the desired baud rate can be achieved using several different
Fractional Divider settings. The following algorithm illustrates one way of finding a set of
DLM, DLL, MULVAL, and DIVADDVAL values. Such a set of parameters yields a baud
rate with a relative error of less than 1.1% from the desired one.
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