FUJITSU MB91460 SERIES FR60 User Manual
Page 662

646
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
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