Technical Reference Manual
002-29852 Rev. *B
Bits Name
SW
HW
Default or
Enum
Description
8
CHECKSUM_
ENHANCED
RW
R
Undefined
Checksum mode:
'0': Classic mode. PID field is NOT included in the
checksum calculation.
'1': Enhanced mode. PID field is included in the
checksum calculation. This mode requires special
attention when the master node transmits the header
and a (different) slave node transmits the response:
the slave node will use the calculated partial checksum
over the received PID field as a starting point for the
calculation over the to be transmitted data fields.
Note: If the frame identifier ID[5:0] is 0x3c or 0x3d, the
classic mode will ALWAYS be used for transmission
and assumed for reception, independent of the
CHECKSUM_ENHANCED value.
16:23 FRAME_TIMEOUT
RW
R
Undefined
Specifies the maximum allowed length (timeout value)
for a frame, frame header or frame response in bit
periods. The LIN specification prescribes to set the
maximum length to 1.4x the nominal length
(Theader_max = 1.4 x Theader_nom and
Tresponse_max = 1.4 x Tresponse_nom). The nominal
header length Theader_nom is 34 bit periods and the
nominal response length Tresponse_nom is 10 *
(d 1) bit periods (data_nr is the number of data
fields)
Note: the LIN specification specifies the following:
'Tools and tests shall check the Tframe_max (=
Thead Tresponse_max). Nodes shall not
check this time. The receiving node of the frame shall
accept the frame up to the next frame slot (i.e. next
break field), even if it is longer then Tframe_max).'
24:25 FRAME_TIMEOUT_SEL
RW
R
0
Specifies the frame timeout mode:
'0': No timeout functionality (default value).
'1': Frame mode: detects timeout from the start of
break field to checksum field STOP bits (inclusive).
The minimum FRAME_TIMEOUT value is 34+20 bit
periods (header and a response with 1 data field).
'2': Frame header mode: detects timeout from the start
of break field to PID field STOP bits (inclusive). The
minimum FRAME_TIMEOUT value is 34 bit periods
(header).
'3': Frame response mode: detects timeout from the
PID field STOP bits (exclusive) to checksum field
STOP bits (the response space is included in the
frame response). The minimum FRAME_TIMEOUT
value is 20 bit periods (response with 1 data field).
1049
2022-04-18
TRAVEO™ T2G Automotive MCU: TVII-B-E-4M body controller entry registers