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ST72344S2 Datasheet(PDF) 133 Page - STMicroelectronics

Part # ST72344S2
Description  SCI asynchronous serial interface
PDF  247 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72344S2 Datasheet(HTML) 133 Page - STMicroelectronics

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ST72344xx, ST2345xx
On-chip peripherals
Doc ID 12321 Rev 6
133/247
Figure 64.
Word length programming
1.
LBCL bit controls last data clock pulse.
Transmitter
The transmitter can send data words of either 8 or 9 bits depending on the M bit status.
When the M bit is set, word length is 9 bits and the 9th bit (the MSB) has to be stored in the
T8 bit in the SCICR1 register.
When the transmit enable bit (TE) is set, the data in the transmit shift register is output on
the TDO pin.
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Bit8
Start
Bit
Stop
Bit
Next
Start
Bit
Idle Frame
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Start
Bit
Stop
Bit
Next
Start
Bit
Idle Frame
Start
Bit
9-bit (M bit is set)
8-bit (M bit is reset)
Possible
Parity
Bit
Possible
Parity
Bit
Break Frame
Start
Bit
Extra
’1’
Data Frame
Break Frame
Start
Bit
Extra
’1’
Data Frame
Next Data Frame
Next Data Frame
Start
Bit
****
CLOCK
CLOCK
(1)
(1)



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