Fujitsu F2MC-8FX Hardware Manual page 366

CHAPTER 20 UART/SIO
Figure 20.7-10 Baud Rate Calculation Formula for Using Dedicated Baud Rate Generator
Baud rate value =
UART prescaler selection register (PSSR)
Prescaler selection (PSS1, PSS2)
Serial clock
The serial clock signal is outputted under control of the output for transmit data. When only reception is
performed, therefore, set transmission control (TXE = 1) to write dummy transmit data to the UART/SIO
serial output register.
Refer to the data sheet for the UCK clock value.
Reception in UART/SIO operation mode 1
For reception in operation mode 1, each register is used as follows.
352
Machine clock (MCLK)
1
2
2
×
4
8
UART baud rate setting register
(BRSR)
Baud rate setting (BRS7 to BRS0)
1
× :
256
[bps]