User Manual
72
Rev. 1.1
2019-03-18
TLE984xQX
Microcontroller with LIN and Power Switches for Automotive Applications
Power Management Unit (PMU)
6.7
Reset Management Unit (RMU)
The RMU controls the reset behavior of the entire device. The master reset of the device is the power-on reset
of the PMU itself. This reset is generated by the Power Down Supply and it is released when the battery voltage
(Vs) reaches the minimum supply voltage for Active Mode. Then the PMU starts the sequence to power-up the
supply generation module which ends with the release of the MCU reset. If this status is reached then the
embedded system will work in Active Mode. This scenario is signalled by the PMU_1V5DidPOR flag in the
. The figure below shows the power-on reset behavior.
Figure 21 Power-On and Startup Behavior of Reset
Timing_Diagram_Power_Up_Customer.vsd
Vs
1,5V
Power Down_POR_N
5V
VDDP
3V
SYSTEM_STATE
Active
Down
LP_CLK
1.5V
VDDC
80
H
xx
H
PMU_RESET_STS
RESET_PIN
Start-up
fail
stable
SUPPLY_STATUS
ok
4,0V
3.5V