Data Sheet
35
Rev. 1.00
2017-07-31
TLE9262BQXV33
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 12.2.1
) 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
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.
Cyclic Sense Configuration
Assign Timer to selected HS switch
in
HS_CTRL_X
Enable WKx as wake source with
configured Timer in
WK_FLT_CTRL
Cyclic Sense starts / ends by
setting / clearing On-time
Timer1, Timer2
Select Timer Period and desired
On-Time in
TIMERx_CTRL
WK1, WK2, WK3 with
above selected timer
Period : 10, 20, 50, 100, 200ms, 1s, 2s
On-Time: 0.1, 0.3, 1.0, 10, 20ms
Assign TIMERx_ON to OFF/Low or
OFF/High in
TIMERx_CTRL
Timer1, Timer2
Select WKx pull-up / pull-down
configuration in
WK_PUPD_CTRL
No pull-up/-down, pull-down or pull-up
selected, automatic switching
Changing the settings can be done on the
fly, changes become effective at the next
on-time or period
