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TLE9185QXV33 Datasheet(PDF) 36 Page - Infineon Technologies AG |
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TLE9185QXV33 Datasheet(HTML) 36 Page - Infineon Technologies AG |
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36 / 192 page  TLE9185QXV33 BLDC Driver High-Voltage Wake Input Datasheet 36 Rev.1.0 2021-01-21 7.2 High-Voltage Wake Function 7.2.1 Functional Description The wake inputs pin are edge-sensitive inputs with a switching threshold of typically 3 V. Both transitions, high to low and low to high, result in a signalization by the device. The signalization occurs either in triggering the interrupt in Normal Mode and Stop Mode or by a wake up of the device in Sleep Mode and Fail-Safe Mode. A filter time tFWKx is implemented to avoid an unintentional wake-up due to transients or EMC disturbances in static sense configuration. The filter time (tFWKx) is triggered by a level change crossing the switching threshold and a wake signal is recognized if the input level will not cross again the threshold during the selected filter time. Figure 18 shows a typical wake-up timing and filtering of transient pulses. Figure 18 Wake-up Filter Timing for Static Sense The wake-up capability for the WKx pin can be enabled or disabled via SPI command. A wake event via the WKx pin can always be read in the register WK_STAT. The actual voltage level of the WKx pin (low or high) can always be read in Normal Mode, Stop Mode and Init Mode in the register WK_LVL_STAT. 7.2.2 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_CTRL. Table 13 Pull-Up / Pull-Down Resistor WKx_PUPD_ 1 WKx_PUPD_ 0 Current Sources Note 00 no current source WK input is floating if left open (default setting) 0 1 pull-down WK input internally pulled to GND VWKTh,f t VWKx tFWK No Wake Event Wake Event VWKth,f tFWK t VINTN tINTN |
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