Extended Prescaler Mode; Serial Data Format; Transmitter; Figure 78. Word Length Programming - STMicroelectronics ST72361 Auto Series Manual

ST72361xx-Auto
15.5.2

Extended prescaler mode

Two additional prescalers are available in extended prescaler mode. They are shown in
Figure 79.
●
An extended prescaler receiver register (SCIERPR)
●
An extended prescaler transmitter register (SCIETPR)
15.5.3

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
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 a continuous logic high level for 10 (or 11) full bit times.
A break character is a character with a sufficient number of low level bits to break the normal
data format followed by an extra "1" bit to acknowledge the start bit.

Figure 78. Word length programming

15.5.4

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.
LINSCI serial communication interface (LIN master/slave)
Figure 78).
9-bit Word length (M bit is set)
Data Character
Start
Bit2
Bit0 Bit1 Bit3
Bit
Idle Line
Break Character
8-bit Word length (M bit is reset)
Data Character
Start
Bit2
Bit0 Bit1
Bit
Idle Line
Break Character
Doc ID 12468 Rev 3
Bit5 Bit6
Bit4 Bit7
Possible
Parity
Bit
Bit3 Bit4 Bit5 Bit6 Bit7
Possible
Next Data Character
Parity
Bit
Next
Start
Stop
Bit8
Bit
Bit
Start
Bit
Start
Extra
Bit
'1'
Next Data Character
Next
Start
Stop
Bit
Bit
Start
Bit
Start
Extra
Bit
'1'
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