TLE9261-3QX Datasheet, PDF (28/186 Pages) Infineon Technologies AG – Dedicated Data Sheets are available for the different product variants

TLE9261-3QX
System Features
5.1.4 SBC Sleep Mode
The SBC Sleep Mode is the second level technique to reduce the overall current consumption to a minimum
needed to react on wake-up events or for the SBC to perform autonomous actions (e.g. cyclic sense). In this mode,
VCC1 is OFF and not supplying the microcontroller anymore.The VCC2 supply as well as the HSx outputs can be
configured to stay enabled. The settings have to be done before entering SBC Sleep Mode. A wake-up event on
CAN or WKx will bring the device via SBC Restart Mode into SBC Normal Mode again and signal the wake source.
The configuration options are listed below:
• VCC1 is OFF
• VCC2 is fixed as configured in SBC Normal Mode
• VCC3 is fixed or OFF as configured in SBC Normal Mode
• CAN mode changes automatically from ON or Receive Only Mode to wake capable mode or can be selected
to be OFF
• WK pins are fixed as configured in SBC Normal Mode
• HS Outputs are fixed as configured in SBC Normal Mode
• Cyclic sense is fixed as configured in SBC Normal Mode
• Cyclic wake is not available
• Watchdog is OFF
• FOx outputs are fixed, i.e. the state from SBC Normal Mode is maintained
• As VCC1 is OFF during SBC Sleep Mode, no SPI communication is possible;
• The Sleep Mode entry is signalled in the SPI register DEV_STAT with the bit DEV_STAT
It is not possible to switch all wake sources off in SBC Sleep Mode. Doing so will set the SPI_FAIL flag and will
bring the SBC into SBC Restart Mode.
In order to enter SBC Sleep Mode successfully, all wake source signalization flags from WK_STAT_1 and
WK_STAT_2 need to be cleared. A failure to do so will result in an immediate wake-up from SBC Sleep Mode by
going via SBC Restart to Normal Mode.
All settings must be done before entering SBC Sleep Mode.
Note: If switches are enabled during SBC Sleep mode, e.g. HSx on with or without PWM, then the SBC current
consumption will increase (see Chapter 4.4).
Note: Cyclic Sense function will not work properly anymore in case of an overcurrent, over temperature, under- or
overvoltage (in case function is selected) event because the respective HS switch will be disabled.
Note: When WK1 and WK2 are configured for the alternate measurement function (WK_MEAS = 1) then the wake
inputs cannot be selected as wake input sources.
Data Sheet
28
Rev. 1.1, 2014-09-26