ST72561J9-Auto STMicroelectronics, ST72561J9-Auto Datasheet - Page 180

• Manufacturer Part Number: ST72561J9-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST72561J9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years at 55 °C
• 5 Power Saving Modes: halt, auto wake up from halt, active halt, wait and slow

LINSCI serial communication interface (LIN master/slave)
180/324
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When LHE is set due to this error then the SCI goes into a blocked state (LSF bit is set).
LIN header time-out error
When the LIN Identifier field detection method is used (by configuring LHDM to 1) or when
LIN auto-resynchronization is enabled (LASE bit = 1), the LINSCI automatically monitors the
T
If the entire Header (up to and including the STOP bit of the LIN identifier field) is not
received within the maximum time limit of 57 bit times then a LIN header error is signalled
and the LHE bit is set in the SCISR register.
Figure 82. LIN header reception timeout
The time-out counter is enabled at each break detection. It is stopped in the following
conditions:
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●
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If LHE bit is set due to this error during the LIN synchr field (if LASE bit = 1) then the SCI
goes into a blocked state (LSF bit is set).
If LHE bit is set due to this error during fields other than LIN synch field or if LASE bit is reset
then the current received header is discarded and the SCI searches for a new break field.
Note on LIN header time-out limit
According to the LIN specification, the maximum length of a LIN header which does not
cause a timeout is equal to 1.4 * (34 + 1) = 49 T
T
When checking this timeout, the slave node is desynchronized for the reception of the LIN
break and synch fields. Consequently, a margin must be allowed, taking into account the
HEADER_MAX
BIT_MASTER
If the LHE flag is set, it means that:
D > 15.625%
If LHE flag is not set, it means that:
D < 16.40625%
If 15.625% ≤ D < 16.40625%, then the flag can be either set or reset depending on the
dephasing between the signal on the RDI line and the CPU clock.
The second check is based on the measurement of each bit time between both edges
of the synch field: this checks that each of these bit times is large enough compared to
the bit time of the current baud rate.
A LIN identifier field has been received
An LHE error occurred (other than a timeout error).
A software reset of LSF bit (transition from high to low) occurred during the analysis of
the LIN synch field or
refers to the master baud rate.
condition given by the LIN protocol.
Doc ID 12370 Rev 8
LIN Synch
Break
LIN Synch
Field
T
HEADER
BIT_MASTER
Identifier
Field
.
ST72561-Auto