ZHCSMC0A December 2020 – April 2022 TLIN1029A-Q1
PRODUCTION DATA
During normal mode, if TXD is inadvertently driven
permanently low by a hardware or software application failure, the LIN bus is
protected by the dominant state timeout timer. This timer is triggered by a falling
edge on the TXD pin. If the low signal remains on TXD for longer than
tDST, the transmitter is disabled, thus allowing the LIN bus to
return to recessive state and communication to resume on the bus. The protection is
cleared and the
tDST timer is reset by a
rising edge on TXD. The TXD pin has an internal pull-down to ensure the device fails
to a known state if TXD is disconnected. During this fault, the transceiver remains
in normal mode (assuming no change of stated request on EN), the transmitter is
disabled, the RXD pin reflects the LIN bus and the LIN bus pull-up termination
remains on.