DEMO9S08EL32 Freescale Semiconductor, DEMO9S08EL32 Datasheet - Page 207

BOARD DEMO FOR 9S08 EL MCU

DEMO9S08EL32

Manufacturer Part Number
DEMO9S08EL32
Description
BOARD DEMO FOR 9S08 EL MCU
Manufacturer
Freescale Semiconductor
Type
MCUr
Datasheets

Specifications of DEMO9S08EL32

Contents
Evaluation Board
Processor To Be Evaluated
MC9S08EL32
Data Bus Width
8 bit
Interface Type
RS-232, USB
Operating Supply Voltage
12 V
Silicon Manufacturer
Freescale
Core Architecture
HCS08
Core Sub-architecture
HCS08
Silicon Core Number
MC9S08
Silicon Family Name
S08EL
Rohs Compliant
Yes
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
209

Related parts for DEMO9S08EL32