TLE9263QX
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).
High Side
1-4
HS x
HS_CTRL
Signals
GND
Switching
Circuitry
TIMER_CTRL
Period / On-Time
INT
SBC
to uC
STATE
MACHINE
WK x
WK
1-3
WK_FLT_CTRL
Figure 5
Cyclic Sense Working Principle
Data Sheet
31
Rev. 1.1, 2014-09-26
INFINEON [ Infineon ]
