
Data Sheet
100
Rev. 1.00
2017-07-31
TLE9262-3BQX
LIN Transceiver
11.2
Functional Description
The LIN Bus is a single wire, bi-directional bus, used for in-vehicle networks. The LIN transceivers implemented
inside the TLE9262-3BQX are the interface between the micro controller and the physical LIN Bus. The digital
output data from the micro controller are driven to the LIN bus via the TXD input pin on the TLE9262-3BQX.
The transmit data stream on the TXD input is converted to a LIN bus signal with optimized slew rate to
minimize the EME level of the LIN network. The RXD output sends back the information from the LIN bus to the
micro controller. The receiver has an integrated filter network to suppress noise on the LIN Bus and to increase
the EMI (Electro Magnetic Immunity) level of the transceiver.
Two logical states are possible on the LIN Bus according to the LIN Specification 2.2.
Every LIN network consists of a master node and one or more slave nodes. To configure the TLE9262-3BQX for
master node applications, a resistor in the range of 1 k
Ω
and a reverse diode must be connected between the
LIN bus and the power supply VSHS.
The different transceiver modes can be controlled via the SPI
LIN1
bits.
Figure 38
shows the possible transceiver mode transitions when changing the SBC mode.
Figure 38 LIN Mode Control Diagram
11.2.1
LIN OFF Mode
The LIN OFF Mode is the default mode after power-up of the SBC. It is available in all SBC Modes and is
intended to completely stop LIN activities or when LIN communication is not needed. In LIN OFF Mode, a
wake-up event on the bus will be ignored.
SBC Normal Mode
SBC Mode
LIN Transceiver Mode
SBC Stop Mode
SBC Sleep Mode
SBC Restart Mode
Receive Only
Normal Mode
OFF
Wake Capable
Receive Only
OFF
Wake Capable
OFF
Woken
1
OFF
Wake Capable
Normal Mode
Behavior after SBC Restart Mode - not coming from SBC Sleep Mode due to a wake up of the respective transceiver:
If the transceivers had been configured to Normal Mode, or Receive Only Mode, then the mode will be changed to Wake
Capable. If it was Wake Capable, then it will remain Wake Capable. If it had been OFF before SBC Restart Mode, then it
will remain OFF.
Behavior in SBC Development Mode:
LIN default value in SBC INIT MODE and entering SBC Normal Mode from SBC Init Mode is ON instead of OFF.
1
after a wake event on LIN Bus
SBC Fail-Safe Mode
Wake Capable
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