TLE9261-3QX Datasheet, PDF (33/186 Pages) Infineon Technologies AG – Dedicated Data Sheets are available for the different product variants

TLE9261-3QX
System Features
5.2.1.1 Configuration and Operation of Cyclic Sense
The correct sequence to configure the cyclic sense is shown in Figure 6. All the configurations have to be
performed before the on-time is set in the TIMERx_CTRL registers. The settings “OFF / LOW” and “OFF / HIGH”
define the voltage level of the respective HS driver before the start of the cyclic sense. The intention of this
selection is to avoid an unintentional wake due to a voltage level change at the start of the cyclic sense.
Cyclic Sense (=TimerX) will start as soon as the respective on-time has been selected independently from the
assignment of the HS and filter configuration. The selection of the respective timer (Config C/D see
Chapter 11.2.1) must therefore be done before starting the timer. The correct configuration sequence is as
follows:
• Configure the initial level
• Mapping of a Timer to the respective HSx outputs
• Configuring the respective filter timing and WK pins
• Configuring the timer period and on-time
Cyclic Sense Configuration
Assign TIMERx_ON to OFF/Low or
OFF/High in TIMERx_CTRL
Timer1, Timer2
Assign Timer to selected HS switch
in HS_CTRL_X
Timer1, Timer2
Enable WKx as wake source with
configured Timer in WK_FLT_CTRL
WK1, WK2, WK3 with
above selected timer
Select WKx pull-up / pull-down
configuration in WK_PUPD_CTRL
No pull-up/-down, pull-down or pull-up
selected, automatic switching
Select Timer Period and desired
On-Time in TIMERx_CTRL
Period : 10, 20, 50, 100, 200ms, 1s, 2s
On-Time: 0.1, 0.3, 1.0, 10, 20ms
Cyclic Sense starts / ends by
setting / clearing On-time
Changing the settings can be done on the
fly, changes become effective at the next
on-time or period
Figure 6 Cyclic Sense: Configuration and Sequence
Note: All configurations of period and on-time can be selected. However, recommended on-times for cyclic sense
are 0.1ms, 0.3ms and 1ms. The SPI_FAIL will be set if the on-time is longer than the period.
Data Sheet
33
Rev. 1.1, 2014-09-26