SBC Init Mode
*
(Long open window )
VCC1
ON
(2)
FO
inact.
CAN
OFF
(3)
Wake up ev ent
via CANx or WK
Any SPI
command
SPI cmd
WD trigger
First battery connection
VIO Undervoltage
Automatic
SBC Soft Reset
§ Reset is released
§ WD starts with long open window
(1) After Fail-Safe Mode entry, the device will stay for at least
typ. 1s in this mode (with RO low) after a TSD2 event and min.
ty p. 100ms after other Fail -Safe Events . Only then the dev ice
can leave the mode via a wake -up event . Wake events are
stored during this time .
(2) The behaviour depends of the PCFG configuration . If PCFG
is open, the VEXT is by default off and it can be acivated from
the µC with one of the four configurable output voltages . If
PCFG = GND, the VEXT follows the VCC1 in the state machine
with fixed output voltage value at 3.3V.
(3) For SBC Development Mode CAN is in Normal Mode in
SBC Init Mode and will stay ON when going from there to SBC
Normal Mode
(4) See chapter CAN for detailed behavior in SBC Restart Mode
(5) CAN transceiver can be SWK capable , depending on
configuration
(6) The Boost regulator activation depends from the VS value .
SBC Normal Mode
FO
act/inact
CAN
Config.
(3)
Boost
(6)
conf./OFF
SBC Restart Mode
(RO pin is asserted)
Config.: settings can be configured in
this SBC mode;
Fixed: settings stay as defined in
SBC Normal Mode
*
The SBC Development Mode is a
super set of state machine where the
WD timer is stopped and CANx
behavior differs in SBC Init Mode.
Otherwise, there are no differences in
behavior (see also Chapter 5.1.7).
Cyc.Wake
OFF
Cyc.Wake
config.
CANx, W K wake-up event
VIO over voltage
Config 1/3 (if VIO_OV_RST set)
Watchdog Failure :
Config 1/3 (MAX_3_RST not set)
& 1st WD failure in Config4
Boost
OFF
VEXT
(2)
def.
by PCFG pin
VCC1
(2)
ON
VEXT
(2)
def.
by PCFG pin
SBC Stop Mode
Cyc.Wake
fixed
Boost
(6)
fixed/OFF
CAN
(5)
fixed
FO
fixed
VCC1
(2)
ON
VEXT
(2)
def.
by PCFG pin
SBC Sleep Mode
Boost
OFF
Cyc.Wake
OFF
CAN
(5)
Wake
cap./OFF
FO
fixed
VCC1
OFF
SPI cmd
SPI cmd
1st Watchdog Failure Config 2,
2nd Watchdog Failure , Config 4
VIO Short to GND
SBC Fail-Safe Mode
(1)
TSD2 event
VIO over voltage
Config 2/4 (if VIO_OV_RST set)
4th consecutive VIO
under voltage event
(if VS > VS_UV_TO)
VCC1
OFF
FO
fixed
Boost
OFF
VEXT
OFF
Cyc.Wake
OFF
CAN
Wake
capable
VCC1
(2)
ON
VEXT
(2)
def.
by PCFG pin
Boost
(6)
fixed/OFF
FO
active/
fixed
Cyc.Wake
OFF
CAN
(4)
Woken /
OFF
VEXT
(2)
def.
by PCFG pin
WD
Config.
WD
Config.
WD
OFF
WD
fixed
WD
OFF
WD
OFF