TLE8262-2E Datasheet, PDF (43/94 Pages) Infineon Technologies AG – Universal System Basis Chip

TLE8262-2E
LIN Transceiver
10
LIN Transceiver
The SBC includes up to three LIN blocks, but this chapter describes only one because all three LIN block are
completely identical.
10.1
Block Description
VS
R _BUS
BUSx
Output
Stage
Driver
Temp.-
Protection
Current
Limit
SPI Mode Control
Vcc1µC
TxD Input
Timeout
RTD
TxDx
To SPI Diagnostic
Vs
Wake
Receiver
Receiver
Filter
RxD Diag
Vcc1µC
RxDx
Figure 18 Functional Block Diagram
LIN BLOCK.VSD
10.2
LIN Description
The LIN transceiver cells of the SBC is an interface between the protocol controller and the physical bus. It is
especially suitable for driving the bus line in LIN systems in automotive and industrial applications. It is compatible
to LIN 2.1 as well as SAE J2602-2.
To reduce current consumption, the LIN transceiver offers a LIN Wake Capable Mode and a LIN OFF Mode. The
LIN transceiver has a bus short to GND feature implemented to avoid a battery discharge. The transceiver offers
very good EMC performance within a broad frequency range independent of battery voltage. This is achieved by
implementing a slope control mechanism based on a constant slew rate. In case the V_s < V_UVOFF, the LIN bus pin
has high impedance and the maximum current which can flow in is set to I_BUSlk
10.2.1 LIN Normal Mode
In this mode, it is possible to transmit and receive messages on each BusX. The LIN transceiver enters the LIN
Normal Mode after the microcontroller sends an SPI word (see Chapter 15) and also by entering SBC Software
Flash Mode.
Data Sheet
43
Rev. 1.0, 2009-05-26