Baud Rate Of The External Clock Using The Dedicated Baud Rate Generator - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 21 UART
21.6.2 Baud Rate of the External Clock Using the Dedicated
Baud Rate Generator
Indicates baud rates possible to set when a dedicated baud rate generator of an
external clock is selected, as UART transfer clock. It is used in the clock asynchronous
modes.

Baud Rate of the External Clock Using the Dedicated Baud Rate Generator

Divides the clock by setting the 11-bit reload value at the UART prescaler control registers 0 to 3 (UTCR0
to UTCR3), and the UART prescaler reload registers 0 to 3 (UTRLR0 to UTRLR3).
Provided f for the frequency of the external clock, baud rates are described as follows:
• UTCR0 to UTCR3: If MD is set to "1".
b= f/4n (bps), f
f: Frequency of the external clock,
b: Baud rate
However, please set neither n=1, 2 nor 3.
The maximum frequency of f is 24 MHz.
502
≤
φ
n/4
•
n: Values of D10 to D0 (UTCR0 to UTCR3, UTRLR0 to UTRLR3),