Datasheet 16 Rev. 1.0
2020-07-23
TLE9862QXA40
Modes of operation
Sleep Mode with cyclic wake-up
The Cyclic Wake-Up mode is a special operating mode of the Sleep mode. The transition to Cyclic Wake-Up
mode is performed by first setting the corresponding bits in the mode control register followed by the Sleep
Mode and Stop Mode commands. In addition to the cyclic wake-up behavior (wake-up after a programmable
time period), asynchronous wake events via the activated sources (LIN and/or MON) are available, as in
normal Sleep mode.
When using Sleep mode with cyclic wake-up, the voltage regulator is switched off and started again with the
wake. A limited number of registers is buffered during sleep, and can be used by software, e.g., for counting
sleep/wake cycles.
MCU Slow Down mode
In MCU Slow Down mode the MCU frequency is reduced to save power during operation. LIN communication
is still possible. LS MOSFET can be activated.
Wake-up source prioritization
All wake-up sources have the same priority. In order to handle the asynchronous nature of the wake-up
sources, the first wake-up signal will initiate the wake-up sequence. Nevertheless, all wake-up sources are
latched in order to provide all wake-up events to the application software. The software can clear the wake-
up source flags. This is to ensure that no wake-up event is lost.
As the default wake-up source, the MON input is activated after power-on reset only. Additionally, the device
is in Cyclic Wake-Up mode with the configurable dead time setting.
The following table shows the possible power mode configurations including the Stop mode.
Table 3 Power mode configurations
Module/function Active mode Stop mode Sleep mode Comment
VDDEXT ON/OFF ON (no dynamic
load)/OFF
OFF –
Bridge Driver ON/OFF OFF OFF
LIN TRx ON/OFF Wake-up only/OFF Wake-up only/OFF –
VS sense ON/OFF
Brownout detection
Brownout detection POR on VS Brownout detection
performed in PCU
VBAT_SENSE ON/OFF OFF OFF –
GPIO 5V (wake-up) n.a. Disabled/static OFF –
GPIO 5V (active) ON ON OFF –
WDT1 ON OFF OFF –
CYCLIC WAKE n.a. Cyclic wake-up/
cyclic sense/OFF
Cyclic wake-up/OFF –
Measurement ON
1)
1) May not be switched off due to safety reasons.
OFF OFF –
MCU ON/slow-down/STOP STOP
2)
2) MC PLL clock disabled, MC supply reduced to V
DDCOUT_Stop_Red
.
OFF –
CLOCK GEN (MC) ON OFF OFF –
LP_CLK (18 MHz) ON OFF OFF WDT1
LP_CLK2 (100 kHz) ON/OFF ON/OFF ON/OFF For cyclic wake-up