mc35xs3500 Freescale Semiconductor, Inc, mc35xs3500 Datasheet - Page 22

• Manufacturer Part Number: mc35xs3500
• Description: Smart Rear Corner Light Switch Penta 35 M
• Manufacturer: Freescale Semiconductor, Inc

Autorestart Strategy
and reactivate high side switches in case of overload or
under-voltage failure conditions, and provide a high
availability of the outputs.
supervising intelligence of the microcontroller is available.
Autorestart is activated in case of an overload condition
(OCHI2 or OCLO) or under-voltage condition on VBAT
9, Overcurrent window in case of
state of the switch OCHI1, the window is enabled for
tochi_Auto, then after the output is protected by OCLO.
wake up (wake=0, then 1).
OFF. After the autorestart period (75 ms) is turned ON again.
latched and delatched after the auto restart period
(t
22
35XS350
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
AUTORST
Figure 9. Overcurrent window in case of Autorestart
The autorestart circuitry is used to supervise the outputs
This autorestart is available in Fail mode when no
The autorestart switches ON the outputs. During the ON
Output current
OCHI1
In case of OCHI1 or OT, the switch is latched OFF until
In case of OCLO or under-voltage, the output switch is
In case an under-voltage occurred in Fail mode, it will be
OCLO
tochi_auto
).
OCLO or UV fault
Auto period
Autorestart).
time
(Table
Transition Fail to Normal Mode
(fail=0). The microcontroller has to toggle the SPI D10 bit (0
to 1) to reset to the watchdog bit; the other bits are not
considered. The previous latched faults are reset by the
transition into Normal mode.
Transition Normal to Fail Mode
(fail=1). The previous latched faults are reset by the transition
into Fail mode.
Safe mode until the WD bit toggles through the SPI (from [0]
to [1]).
to logic [0]).
the following sequence is provided:
function is not guaranteed.
POWER OFF MODE
voltage is below V
please refer to
START-UP SEQUENCE
The Autorestart is not limited in time.
To leave the Fail mode, the fail condition must be removed
To leave the Normal mode, a fail condition must occur
If the SI is shorted to VCC, the device transmits to Fail
All settings are according to predefined values (all bits set
The 35XS3500 enters into Normal mode after start-up if
• V
• Generate a wake-up event (wake=1) from 0 to 1 on
• Apply the PWM clock after a maximum of 200 μs (min
• Send a SPI command to the device status register to
If the correct startup sequence is not provided, the PWM
Figure 10
The 35XS3500 is in Power OFF mode when the battery
under-voltage thresholds (Sleep mode).
RST. The device switches to Normal mode.
50 μs).
clear the clock fail flag and enable the PWM module to
start.
BAT
and V
describes the wake-up block diagram..
Loss of VBAT
CC
BATPOR[1,2]
power supplies must be above their
Analog Integrated Circuit Device Data
paragraph.
thersholds. For more details,
Freescale Semiconductor