TLE9261-3QX Datasheet, PDF (94/186 Pages) Infineon Technologies AG – Dedicated Data Sheets are available for the different product variants

TLE9261-3QX
Wake and Voltage Monitoring Inputs
11.2.1 Wake Input Configuration
To ensure a defined and stable voltage levels at the internal comparator input it is possible to configure integrated
current sources via the SPI register WK_PUPD_CTRL. In addition, the wake detection modes (including the filter
time) can be configured via the SPI register WK_FLT_CTRL. An example illustration for the automatic switching
configuration is shown in Figure 39.
Table 25 Pull-Up / Pull-Down Resistor
WKx_PUPD WKx_PUPD Current Sources Note
_1
_0
0
0
no current source WKx input is floating if left open (default setting)
0
1
pull-down
WKx input internally pulled to GND
1
0
pull-up
WKx input internally pulled to internal 5V supply
1
1
Automatic
If a high level is detected at the WKx input the pull-up source is
switching
activated, if low level is detected the pull down is activated.
Note: If there is no pull-up or pull-down configured on the WK input, then the respective input should be tied to
GND or VS on board to avoid unintended floating of the pin and subsequent wake events.
I_{WKth_min}
I _{WKth _max}
I _WK
VWKth
Figure 39 Illustration for Pull-Up / Down Current Sources with Automatic Switching Configuration
Table 26 Wake Detection Configuration and Filter Time
WKx_FLT_1 WKx_FLT_0 Filter Time
Description
0
0
Config A
static sense, 16µs filter time
0
1
Config B
static sense, 64µs filter time
1
0
Config C
Cyclic sense, Timer 1, 16µs filter time. Period, On-time
configurable in register TIMER1_CTRL
1
1
Config D
Cyclic sense, Timer 2, 16µs filter time. Period, On-time
configurable in register TIMER2_CTRL
Config A and B are intended for static sense with two different filter times.
Config C or D are intended for cyclic sense configuration. With the filter settings, the respective timer needs to be
assigned to one or more HS output, which supplies an external circuit connected to the WKx pin, e.g. HS1
controlled by Timer 2 (HS1 = 010) and connected to WK3 via an switch circuitry - see also Chapter 5.2.
Data Sheet
94
Rev. 1.1, 2014-09-26