TLE9843-2QX
Modes of Operation
Data Sheet 16 Rev. 1.0, 2016-05-06
Reset Mode
The Reset Mode is a transition mode e.g. during power-up of the device after a power-on reset. In this mode the
on-chip power supplies are enabled and all other modules are initialized. Once the core supply VDDC is stable,
the Active Mode is entered. In case the watchdog timer WDT1 fails for more than four times, a fail-safe transition
to the Sleep Mode is done.
Active Mode
In Active Mode all modules are activated and the TLE9843-2QX is fully operational.
Stop Mode
The Stop Mode is one out of two major low power modes. The transition to the low power modes is done by setting
the respective Bits in the mode control register. In Stop Mode the embedded microcontroller is still powered
allowing faster wake-up reaction times, but not clocked. A wake-up from this mode is possible by LIN bus activity,
the High Voltage Monitor Input pins or the respective 5V GPIOs.
Sleep Mode
The Sleep Mode is a major low-power mode. The transition to the low-power modes is done by setting the
respective Bits in the Micro Controller Unit mode control register. The sleep time is configurable. In Sleep Mode
the embedded microcontroller power supply is deactivated, allowing the lowest system power consumption, but
the wake-up time is longer compared to the Stop Mode. In this mode a 64 bit wide buffer for data storage is
available. A wake-up from this mode is possible by LIN bus activity or the High Voltage Monitor Input pins and
cyclic wake. A wake-up from Sleep Mode behaves similar to a power-on reset. While changing into Sleep Mode,
no incoming wake-requests are lost (i.e. no dead-time). It is possible to enter sleep-mode even with LIN dominant.
Cyclic Wake-up Mode
The cyclic wake-up mode is a special operating mode of the Sleep Mode and the Stop Mode. The transition to the
cyclic wake-up mode is done by first setting the respective Bits in the mode control register followed by the SLEEP
or STOP command. Additional to the cyclic wake-up behavior (wake-up after a programmable time period), the
wake-up sources of the normal Stop Mode and Sleep Mode are available.
Cyclic Sense Mode
The cyclic sense mode is a special operating mode of the Sleep Mode and the Stop Mode. The transition to the
cyclic sense mode is done by first setting the respective Bits in the mode control register followed by the STOP or
SLEEP command. In cyclic sense mode the High-Side Switch can be switched on periodically for biasing some
switches for example. The wake-up condition is configurable, when the sense result of defined monitor inputs at
a window of interest changed compared to the previous wake-up period or reached a defined state respectively.
In this case the Active Mode is entered immediately.
The following table shows the possible power mode configurations of each major module or function respectively.
Table 3 Power Mode Configurations
Module/function Active Mode Sleep Mode Stop Mode Comment
VPRE, VDDP, VDDC ON OFF ON –
VDDEXT ON/OFF OFF cyclic ON/OFF –
HSx ON/OFF cyclic ON/OFF cyclic ON/OFF cyclic sense
LSx ON/OFF OFF OFF –
LIN TRx ON/OFF wake-up only / OFF wake-up only/
OFF
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