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FUJITSU MB91460 SERIES FR60 User Manual

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Chapter 32 USART (LIN / FIFO)

6.USART Baud Rates

Figure 6-3 Reload Counter Restart example

In this example the number of MCU clock cycles (cyc) after REST is then:

cyc = v - c + 1 = 100 - 90 + 1 = 11,

where v is the reload value and c is the read counter value.

(Note)

If USART is reset by setting SMR04:UPCL, the Reload Counters will restart too.

Automatic Restart

In asynchronous UART mode if a falling edge of a start bit is detected the Reception Reload Counter is
restarted. This is intended to synchronize the serial input shifter to the incoming serial data stream.

MCU

REST

Reload
Value

37 36 35 100 99 98 97 96 95 94 93 92 91 90 89 88 87

Read
BGR0/1

Data
Bus

90

: don’t care

Reload

Clock

Counter
Clock
Outputs