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FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
SLEEP MODE
The Sleep mode is the default mode of the 10XS3535.
This is the state of the device after first applying battery
voltage (V BAT ) and prior to any I/O transitions. This is also the
state of the device when IGN, FOG, FLASHER, and RST are
logic [0] (wake=0). In the Sleep mode, the outputs and all
internal circuitry are OFF to minimize current draw. In
addition, all SPI-configurable features of the device are reset.
The 10XS3535 will transit to two modes (Normal and Fail)
depending on wake and fail signals (see Fig13).
The transition to the other modes is according following
signals:
? Wake = IGN or IGN_ON or FLASHER or
FLASHER_ON or RST or FOG or FOG_ON
? Fail = VCC fail or SPI fail or External limp
NORMAL MODE
The 10XS3535 is in Normal mode when:
? Wake = 1
? Fail = 0
I n Normal operating mode the power outputs are under full
control of the SPI as follows:
? The outputs 1 to 6, including multiphase timing and
selectable slew-rate, are controlled by the
programmable PWM module.
? The outputs 1 to 5 are switched OFF in case of an
under-voltage on VBAT.
? The outputs 1 to 5 are protected by the selectable over-
current double window and over-temperature shutdown
circuit.
? The digital diagnosis feature transfers status of the
smart outputs via SPI.
D7 bit
D0-D6 bits
Output
Over-current
FAIL MODE
The 10XS3535 is in Fail mode when:
? Wake = 1
? Fail = 1
I n Fail mode:
? The outputs are under control of external pins (see
? The outputs are fully protected in case of an overload,
over-temperature and under-voltage (on VBAT or on
VCC).
? The SPI reports continuously the content of address 11,
disregard to previous requested output data word.
? Analog current sense is not available.
? Output 2 is configured in Xenon mode.
? In case of an overload (OCHI2 or OCLO) conditions or
under-voltage on VBAT, the outputs are under control
of autorestart feature.
? In case of serious overload condition (OCHI1 or OT) the
corresponding output is latched OFF until a new wake-
up event (wake=0 then 1).
IGN_ON
? The analog current sense output (current recopy
feature) can be routed by SPI.
? The outputs 1 and 5 can be configured to control LED
loads: R DS(ON) is increased by a factor of 2 and the
current recopy ratio is scaled by a factor of 4.
? The SPI reports NM=1 in this mode.
IGN (external)
OUT[1,2]
Over-current
1.4 sec min
The figure below describes the PWM, outputs and over-
current behavior in Normal mode.
Table 6. Limp Home Output State
Output 1
Parking Light
IGN Pin
Output 2
Low Beam
IGN Pin
Output 3
High Beam
OFF
Output 4
Fog Light
FOG Pin
Output 5
Flasher
FLASHER Pin
External Switch
Spare
OFF
MC10XS3535
Analog Integrated Circuit Device Data ?
Freescale Semiconductor
25
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