User Manual
73
Rev. 1.1
2019-03-18
TLE984xQX
Microcontroller with LIN and Power Switches for Automotive Applications
Power Management Unit (PMU)
In case of a Sleep Mode exit a similar sequence used for battery ramp-up starts. If this sequence ends
successfully then the PMU also releases the reset of the MCU. From the MCU point of view there is no difference
to the battery ramp-up. Only inside of the RMU the identification bit
PMU_SleepEx
is set instead of the power-
on identification bit.
Figure 22 Power-Down and Power Loss Sequence
In the default configuration the wake-up from Stop Mode works without reset. To wake-up with reset the
corresponding
SFR
bit WAKE_W_RST inside the
register must be configured. With this
configuration the wake-up signal sets the dedicated identification bit PMU_WAKE which can be checked by
the application software.
Timing_Diagram_Power_Down_Customer.vsd
5V
VDDP
2.6V
LP_CLK
1.5V
VDDC
RESET_PIN
stable
reset
SUPPLY_STATUS
ok
SYSTEM_STATE
Off
Active
Vs
1,3V
Power Down_POR_N
3,0V
5,5V