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ST72344K2 데이터시트(PDF) 132 Page - STMicroelectronics

부품명 ST72344K2
상세설명  SCI asynchronous serial interface
PDF  247 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72344K2 데이터시트(HTML) 132 Page - STMicroelectronics

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On-chip peripherals
ST72344xx, ST2345xx
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Doc ID 12321 Rev 6
11.5.4
Functional description
The block diagram of the Serial Control Interface, is shown in Figure 63. It contains six
dedicated registers:
●
2 control registers (SCICR1 and SCICR2)
●
A status register (SCISR)
●
A baud rate register (SCIBRR)
●
An extended prescaler receiver register
(SCIERPR)
●
An extended prescaler transmitter register
(SCIETPR)
Refer to the register descriptions in Section 11.5.7 for the definitions of each bit.
Serial data format
Word length may be selected as being either 8 or 9 bits by programming the M bit in the
SCICR1 register (see Figure 64).
The TDO pin is in low state during the start bit.
The TDO pin is in high state during the stop bit.
An Idle character is interpreted as an entire frame of “1”s followed by the start bit of the next
frame which contains data.
A Break character is interpreted on receiving “0”s for some multiple of the frame period. At
the end of the last break frame the transmitter inserts an extra “1” bit to acknowledge the
start bit.
Transmission and reception are driven by their own baud rate generator.



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