TLE7259G Datasheet, PDF (6/23 Pages) Infineon Technologies AG – LIN Transceiver

TLE 7259 G
Operation Modes
Start Up
Power Up
Normal Mode
EN
High
INH
High
EN High
EN Low
EN High
Stand-By
EN RxD
Low Low ¹⁾
Floating ²⁾
TxD
Low ³⁾
High ⁴⁾
INH
High
Sleep Mode
EN
INH
Low Floating
Wake Up
via Bus: t > t_wake,bus
via Wake: t > t_wake
1) After wake up (via Bus or Wake)
2) After start up
3) After wake up via Wake (internal strong pull down, > 1.9 mA)
4) After wake up via Bus (internal weak pull down, 350 k Ω )
AEA03514.VSD
Figure 3 Operation Mode State Diagram
Standby Mode
After a power up, wake-up or low supply condition, the TLE 7259 G is automatically
transferred to the standby mode (see Figure 3). This is realized, by setting EN = low due
to a pull-down. The INH output is automatically switching to high level (= V_S), to turn on
the system voltage regulator. In the standby mode, no communication on the bus is
possible. The bus driver is disabled.
In the standby mode, the µC can detect if a wake-up from sleep mode is caused by the
WK pin or a bus message. This is realized by monitoring the RxD and TxD pin (see
Figure 3).
Preliminary Data Sheet
6
Rev. 1.3, 2004-12-13