TLE9260-3QX Datasheet, PDF (32/175 Pages) Infineon Technologies AG – Dedicated Data Sheets are available for the different product variants

TLE9260-3QX
System Features
5.2
Wake Features
Following wake sources are implemented in the device:
• Static Sense: WK inputs are permanently active (see Chapter 10)
• 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 9)
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).
HS x
High Side
1-4
Signals
GND
Switching
Circuitry
INT
to uC
WK x
WK
1-3
HS_CTRL
TIMER_CTRL
Period / On-Time
SBC
STATE
MACHINE
WK_FLT_CTRL
Figure 5 Cyclic Sense Working Principle
Data Sheet
32
Rev. 1.1, 2014-09-26