OPTIREG™ SBC TLE9274QXV33
System features
The VCC2 could be enabled or disabled, CAN and LIN can be configured as Receive-Only mode, or wake
capable or disable. All kind of settings have to be done before entering SBC Stop mode. In SBC Stop mode any
kind of SPI WRITE commands are ignored and the SPI_FAIL bit is set, except for changing to SBC Normal
mode, triggering a SBC soft reset, refreshing the watchdog, write the SYS_STAT_CTRL register as well as
reading and clearing the SPI status registers. A wake-up event on CAN, LIN1, LIN2, LIN3, LIN4 and WK will
create an interrupt on pin INT - however, no change of SBC mode will occur. The configuration options are
listed below:
•
•
VCC1 is ON (buck regulator in PFM mode)
Boost regulator is fixed as configured in SBC Normal mode. The module will start to work as soon as the
VS value drops below the selected threshold
•
•
•
•
•
VCC2 is fixed as configured in SBC Normal mode
CAN is fixed as configured in SBC Normal mode
LIN is fixed as configured in SBC Normal mode
WK is fixed as configured in SBC Normal mode
Cyclic wake is fixed as configured in SBC Normal mode
Note: It is not possible to switch directly from SBC Stop mode to SBC Sleep mode. Doing so will also set the
SPI_FAIL flag and will bring the SBC into Restart mode.
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. In this mode, VCC1 regulator is OFF and not supplying the microcontroller
anymore.The VCC2 supply can be configured to stay enabled. A wake-up event on CAN, LIN1, LIN2, LIN3, LIN4
or WK pin return the device to SBC Normal mode via SBC Restart mode and signal the wake source.
The configuration options are listed below:
•
•
•
•
•
•
VCC1 is OFF
Boost regulator is OFF
VCC2 is fixed as configured in SBC Normal mode
Can must be set to CAN wake capable / CAN off before entering SBC Sleep mode
LIN is fixed as configured in SBC Normal mode
WK is fixed as configured in SBC Normal mode
It is not possible to switch off all wake sources in SBC Sleep mode. When a CAN or LIN transceiver is in its
Normal or Receive-Only mode, it counts as a wake source. In that case it changes automatically to wake
capable when the SBC enters SBC Sleep mode.
All settings must be made before entering SBC Sleep mode. If SPI configurations were sent to the SBC in
SBC Sleep mode, the commands are ignored and there is no response from the SBC.
In order to enter SBC Sleep mode successfully, all wake source signaling flags from WK_STAT_1 and
WK_STAT_2 need to be cleared. Otherwise, the device will immediately wake-up from SBC Sleep mode by
going via SBC Restart to Normal mode.
Note: As soon as the sleep command is sent, the reset will go low to avoid any undefined behavior between SBC
and microcontroller.
Datasheet
23
Rev.2.0
2022-05-06
INFINEON [ Infineon ]
