User Manual
32
Rev. 1.1
2019-03-18
TLE984xQX
Microcontroller with LIN and Power Switches for Automotive Applications
Power Management Unit (PMU)
Sleep Mode
The Sleep Mode is the power saving mode where the lowest power consumption is achieved. In this mode the
PMU resets all system functionalities and switches off all voltage supplies (VDDP, VDDC, VDDEXT) which are
generated in the PMU. The only submodules of the PMU which stay active are the ones responsible for
controlling the wake-up procedure of the system.
shows the Sleep Mode entry procedure.
Figure 6
Sleep Mode Entry Timing
The Sleep Mode is terminated by a LIN dominant pulse or a corresponding (rising edge / falling edge) activity
at the MON input. These events are triggered outside of the PMU. The PMU itself processes the wake-up
information in an independent FSM which starts the PMU internal system clock to process the following
startup sequences in a synchronous way. A successful startup sequence enters the startup Mode
automatically. The wake-up procedure described is the default setup of the PMU.
The Sleep Mode can be terminated by synchronous wake-up events too. If this is desired, the PMU must be
configured by setting the corresponding SFRs. A synchronous wake-up can be configured using the Cyclic
Timing_Diagram_Sleep_Mode _Entry_Customer.vsd
PMCON0
5V
VDDP
3V
LP_CLK
1.5V
VDDC
RESET_PIN
stable
sleep
SUPPLY_STATUS
sleep
transition
02
H
xx
H
SYSTEM_STATE
Sleep
Active