Datasheet

TLE6251-3G
Application Information
Data Sheet 33 Rev. 1.1, 2011-06-06
11.4 Mode Change to Sleep mode
Mode changes are applied either by a host command, an Wake-Up event or by an under-voltage event. To trigger
a mode change by a host command or in other words by a signal change on the digital input pins EN and NSTB
all power supplies,
V
S
V
IO
and V
CC
need to be available.TLE6251-3G.
By setting the EN pin to logical “High” and the NSTB pin to logical “Low”, the TLE6251-3G enters the Go-To-Sleep
command and after the time t =
t
hSLP
expires, the TLE6251-3G enters into the Sleep mode (see Chapter 5.5). For
any mode change, also for a mode change to Sleep mode the TLE6251-3G disregards the signal on the CAN bus.
Therefore the TLE6251-3G can enter Sleep mode and remain in Sleep mode even if there is a short circuit on the
CAN bus, for example CANH shorted to
V
S
or V
CC
.
In order to recognize a remote Wake-Up, the TLE6251-3G requires a signal change from “Recessive” to
“Dominant” before the Wake-Up filter time starts (see Figure 6 and Figure 18).
Figure 18 Mode change to Sleep while the CANH bus is “Dominant”
11.5 Further Application Information
• Please contact us for information regarding the pin FMEA.
• Existing App. Note
• For further information you may contact http://www.infineon.com/transceiver
CANH
CANL
INH
t = t
Wake
Go-To Sleep
command
Normal
Operation mode
t
t
Sleep mode
no Wake-Up
Wake-Up
NSTB
EN
t
t
t = t
hSLP
„Recessive“ to „Dominant“
change
t = t
Wake
Stand-By mode
RxD
t