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ST72321R7-Auto Datasheet(PDF) 142 Page - STMicroelectronics

Part # ST72321R7-Auto
Description  PLL for 2x frequency multiplication
PDF  243 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72321R7-Auto Datasheet(HTML) 142 Page - STMicroelectronics

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Serial communications interface (SCI)
ST72321xx-Auto
142/243
Doc ID 13829 Rev 1
Figure 64.
SCI baud rate and extended prescaler block diagram
Framing error
A framing error is detected when:
●
The stop bit is not recognized on reception at the expected time, following either a de-
synchronization or excessive noise.
●
A break is received.
When the framing error is detected:
●
The FE bit is set by hardware.
●
Data is transferred from the Shift register to the SCIDR register.
●
No interrupt is generated. However this bit rises at the same time as the RDRF bit
which itself generates an interrupt.
The FE bit is reset by a SCISR register read operation followed by a SCIDR register read
operation.
TRANSMITTER
RECEIVER
SCIETPR
SCIERPR
EXTENDED PRESCALER RECEIVER RATE CONTROL
EXTENDED PRESCALER TRANSMITTER RATE CONTROL
EXTENDED PRESCALER
CLOCK
CLOCK
RECEIVER RATE
TRANSMITTER RATE
SCIBRR
SCP1
fCPU
CONTROL
CONTROL
SCP0 SCT2 SCT1 SCT0 SCR2 SCR1 SCR0
/PR
/16
CONVENTIONAL BAUD RATE GENERATOR
EXTENDED RECEIVER PRESCALER REGISTER
EXTENDED TRANSMITTER PRESCALER REGISTER



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