Data Sheet
34
Rev. 1.00
2017-07-31
TLE9262BQXV33
System Features
5.2
Wake Features
Following wake sources are implemented in the device:
•
Static Sense: WK inputs are permanently active (see
Chapter 12
)
•
Cyclic Sense: WK inputs only active during on-time of cyclic sense period (see below)
•
Cyclic Wake: internal wake source controlled via internal timer (see below)
• CAN wake: Wake-up via CAN message (see
Chapter 10
)
• LIN wake: Wake-up via LIN message (see
Chapter 11
)
5.2.1
Cyclic Sense
The cyclic sense feature is intended to reduce the quiescent current of the device and the application.
In the cyclic sense configuration, one or more high-side drivers are switched on periodically controlled by
TIMER1_CTRL
and
TIMER2_CTRL
. The respective high-side drivers supply external circuitries e.g. switches
and/or resistor arrays, which are connected to one or more wake inputs (see
Figure 5
). Any edge change of the
WKx input signal during the on-time of the cyclic sense period causes a wake. Depending on the SBC mode,
either the INT is pulled low (SBC Normal Mode and Stop Mode) or the SBC is woken enabling the VCC1 (after
SBC Sleep and SBC Fail-Safe Mode).
Figure 5
Cyclic Sense Working Principle
Switching
Circuitry
1-4
High Side
HS x
WK x
SBC
STATE
MACHINE
GND
WK
1-3
WK_FLT_CTRL
HS_CTRL
TIMER_CTRL
Period / On-Time
Signals
to uC
INT
