TLE6251-3G Datasheet, PDF (13/36 Pages) Infineon Technologies AG – High Speed CAN-Transceiver with Wake and Failure Detection

TLE6251-3G
Operation Modes
In order to enter the Stand-By mode or the Sleep mode, the EN signal needs to be set to logical “Low” a defined
time after the NSTB pin was set to logical “Low”. Important for the mode selection is the timing between the falling
edge of the NSTB signal and the EN signal. If the logical signal on the EN pin goes low before the transition time
t < t_hSLP has been reached, the TLE6251-3G enters into Stand-By mode and the INH pin remains connected to the
V_S supply. In the case the logical signal on the EN pin goes low after the transition time t > t_hSLP, the TLE6251-3G
enters into Sleep mode simultaneous with the expiration of the time window t_hSLP and the INH becomes
disconnected from the V_S supply and is floating. (see Figure 5).
NSTB
t_hSLP
t
EN
t
INH
Normal Operation
mode
NSTB
t < t_hSLP
Go-To Sleep
command
t_hSLP
EN
t > t_hSLP
INH
t
Stand-By mode
t
t
t
Normal Operation
mode
Go-To Sleep
command
Sleep mode
Figure 5 Entering Sleep Mode or Stand-By Mode
The signal on the CAN bus has no impact to mode changes. The operation mode can be changed regardless if
the CAN bus is “Dominant” or “Recessive”.
Data Sheet
13
Rev. 1.1, 2011-06-06