TLE9263QX
System Features
5.2.2
Cyclic Wake
The cyclic wake feature is intended to reduce the quiescent current of the device and application.
For the cyclic wake feature one or both timers are configured as internal wake-up source and will periodically
trigger an interrupt in SBC Normal and SBC Stop Mode.
The correct sequence to configure the cyclic wake is shown in Figure 10. The sequence is as follows:
•
•
•
First, disable the timers to ensure that there is not unintentional interrupt when activating cyclic wake,
Enable Timer1 and/or Timer2 as a wake-up source in the register WK_CTRL_1,
Configure the respective period Timer1 and/or Timer2. Also an on-time (any value) must be selected to start
the cyclic wake even if the value is ignored.
Cyclic Wake Configuration
Disable Timer1 and/or Timer2 as a
To avoid unintentional interrupts
wake source in WK_CTRL_1
Periods : 10, 20, 50, 100, 200ms, 1s, 2s
On-times: any
(OFF/LOW & OFF/HIGH are not allowed)
Select Timer Period and any
On-Time in TIMERX_CTRL
No interrupt will be generated ,
if the timer is not enabled as a wake source
Select Timer1 and/or Timer2 as a
wake source in WK_CTRL_1
Cyclic Wake starts / ends by
setting / clearing On-time
INT is pulled low at every rising edge
of On-time except first one
Figure 10 Cyclic Wake: Configuration and Sequence
As in cyclic sense, the cyclic wake function will start as soon as the on-time is configured. An interrupt is generated
for every start of the on time except for the very first time when the timer is started
Data Sheet
36
Rev. 1.1, 2014-09-26
INFINEON [ Infineon ]
