TLE9261-3QX Datasheet, PDF (105/186 Pages) Infineon Technologies AG – Dedicated Data Sheets are available for the different product variants

14
Supervision Functions
14.1
Reset Function
TLE9261-3QX
Supervision Functions
Reset logic
Incl. filter & delay
V CC1
RO
Figure 46 Reset Block Diagram
14.1.1 Reset Output Description
The reset output pin RO provides a reset information to the microcontroller, for example, in the event that the
output voltage has fallen below the under voltage threshold V_RT1/2/3/4. In case of a reset event, the reset output RO
is pulled to low after the filter time t_RF and stays low as long as the reset event is present plus a reset delay time
t_RD1. When connecting the SBC to battery voltage, the reset signal remains LOW initially. When the output voltage
V_cc1 has reached the reset default threshold V_RT1,r, the reset output RO is released to HIGH after the reset delay
time t_RD1. A reset can also occur due to a watchdog trigger failure. The reset threshold can be adjusted via SPI,
the default reset threshold is V_RT1,f. The RO pin has an integrated pull-up resistor. In case reset is triggered, it will
be pulled low for V_cc1 ≥ 1V and for VS ≥ V_POR,f (see also Chapter 14.3).
The timings for the RO triggering regarding VCC1 under voltage and watchdog trigger is shown in Figure 47.
Data Sheet
105
Rev. 1.1, 2014-09-26