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ST7263BHx Datasheet(PDF) 82 Page - STMicroelectronics

Part # ST7263BHx
Description  Low speed USB 8-bit MCU family with up to 32 KB Flash/ROM, DFU capability, 8-bit ADC, WDG, timer, SCI and I²C
PDF  186 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7263BHx Datasheet(HTML) 82 Page - STMicroelectronics

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On-chip peripherals
ST7263Bxx
82/186
Doc ID 7516 Rev 8
11.3.4
Functional description
The block diagram of the Serial Control Interface, is shown in Figure 41 It contains 6
dedicated registers:
●
Two control registers (SCICR1 & SCICR2)
●
A status register (SCISR)
●
A baud rate register (SCIBRR)
Refer to the register descriptions in Section 11.3.7 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 41).
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.
Figure 42.
Word length programming
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
Start
Bit
Idle Frame
Start
Bit
9-bit Word length (M bit is set)
8-bit Word length (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



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