TLE8262-2E Datasheet, PDF (46/94 Pages) Infineon Technologies AG – Universal System Basis Chip

V_BUSX
BUS
Idle
V_{cc 1µC}
WAKE
PATTERN
t_WU
TLE8262-2E
LIN Transceiver
Communication
starts
t
t
RxD
SPI command
LIN Wake capable
mode
LIN Waked
LIN Normal mode
t
Reset (RO)
SBC Sleep mode
t_RDx
SBC
Restart
mode
SBC Normal mode
t
LIN WK from sleep to normal .vsd
Figure 19 Timing during Transition from SBC Sleep to SBC Normal Mode
10.3.1 Transition from SBC Normal to Sleep / Stop Mode
It is recommended to first set the LIN Wake Capable Mode before setting the SBC Sleep or Stop Mode to avoid
missing a wake up event. The reason is identical to the CAN behavior. For additional information, see
Chapter 8.3.1.
Do not change the Transciever setting with the same SPI command that is used to sent the device to Sleep Mode.
10.4
Application Information
10.4.1 Bus Short to GND Feature
The LIN transceiver has a feature implemented to protect the battery from running out of charge in case of a bus
short to GND. When the LIN transceiver is switched to Wake capable or Off, the internal pull-up resistor is switched
off to prevent a large current from flowing to GND. In addition, the transceiver only wakes up on a dominant-to-
recessive edge on the LIN bus, so with the bus shorted to GND the transceiver does not wake up.
10.4.2 Oscillator Tolerance
As required by LIN 2.1, an oscillator clock tolerance < 2% for the protocol handler is possible with LIN transceiver.
10.4.3 LIN Specification
The device fulfills the Physical Layer Specification of LIN 2.1.
The device fulfills the Physical Layer Specification SAE J2602-2.
Data Sheet
46
Rev. 1.0, 2009-05-26