DEMO9S08EL32AUTO Freescale Semiconductor, DEMO9S08EL32AUTO Datasheet - Page 207

• Manufacturer Part Number: DEMO9S08EL32AUTO
• Description: DEMO BOARD EL32 AUTO
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of DEMO9S08EL32AUTO

• Contents: Board, Cable, CD and Documentation
• Processor To Be Evaluated: MC9S08EL32
• Data Bus Width: 8 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 12 V
• For Use With/related Products: MC9S08EL32
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

12.6.7.1
All LIN message frame headers are comprised of three components:
Freescale Semiconductor
•
•
The first is the SYNCHRONIZATION BREAK (SYNCH BREAK) symbol, which is a dominant
(low) pulse at least 13 or more bit times long, followed by a recessive (high) synchronization
delimiter of at least one bit time. In LIN 2.0, this is allowed to be 10 or more bit times in length.
The second part is called the SYNCHRONIZATION FIELD (SYNCH FIELD) and is a single byte
with value 0x55. This value was chosen as it is the only one which provides a series of five falling
(recessive to dominant) transitions on the bus.
LIN Message Headers
MC9S08EL32 Series and MC9S08SL16 Series Data Sheet, Rev. 3
ID ARRIVING IN RX BUFFER
SLIC UPDATES SLCBT
READ ID FROM SLCID
HEADER RECEIVED
PROCESS VALID ID
Figure 12-14. Handling LIN Message Headers
LIN MESSAGE
VALID BREAK
ERROR CODE
CLEAR SLCF
ID FOR THIS
AND SYNCH
READ SLCSV
INTERRUPT
DATA?
NODE
Y
Y
N
?
?
N
N
Y
IDENTIFIER-PARITY ERROR
PROCESS ERROR CODE:
PROCESS ERROR CODE:
BYTE FRAMING ERROR
BYTE FRAMING ERROR
CLEAR SLCF
SET IMSG BIT
READ SLCSV
CLEAR SLCF
INTERRUPT
LIN BUS IDLE
RETURN TO
EXIT ISR
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