Datasheet

Data Sheet 16 Rev. 1.1, 2011-06-06
TLE6251-3G
Wake-Up Functions
6.3 Mode Change via the EN and NSTB pin
Besides a mode change issued by a Wake-Up event, the operation mode on the TLE6251-3G can be changed by
changing the signals on the EN and NSTB pins. Therefore the power supplies
V
CC
and V
IO
have to be active.
According to the mode diagram in Figure 4 the operation mode can be changed directly from Sleep mode to the
Receive-Only mode, Normal Operation mode. A change from Sleep mode direct to Stand-By mode is only possible
via a Wake-Up event. For example by setting the NSTB pin and the EN pin to logical “High” the TLE6251-3G
changes from Sleep mode to Normal Operation mode (see Figure 8).
The pins EN and NSTB have a hysteresis between the logical “Low” and the logical “High” signal in order to avoid
any toggling during the operation mode change.
Figure 8 Wake-Up via Mode Change
EN
INH
t
t
V
M,H
V
M,L
NSTB
t
V
M,H
V
M,L
Sleep mode
Normal Operation
mode
Go-To-Sleep
command
Sleep mode
t
hSLP
t
Mode
t
Mode