35XS3500 Datasheet, PDF (26/41 Pages) Freescale Semiconductor, Inc – Smart Rear Corner Light Switch (Penta 35 mΩ)

FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
between different corner light devices. The register bits D1
and D0 determine the content of the 16 bits of SO data.
(Refer to the section entitled Serial Output Communication
(Device Status Return Data) beginning on page 27.) Bits
D9 : D2 are described in Table 9.
The watchdog timeout is specified by the t _WDTO
parameter. As long as the WD bit (D10) of an incoming SPI
message is toggled within the minimum watchdog timeout
period (WDTO), the device will operate normally. If an
internal watchdog timeout occurs before the WD bit is
toggled, the device will revert to Fail mode. All registers are
cleared. To exit the Fail mode, send valid SPI communication
with WD bit = 1.
Table 9. Initialization Register
SI Address
D15 D14 D13 D12 D11 D10 D9
0
0
0
0
0
WD
0
SI Data
D8
D7
D6
D5
D4
D3
D2
D1
D0
0
STOPen
PWM
sync
0
MUX2 MUX1 MUX0 SOA1 SOA0
x = Don’t care
D6 (PWM sync) = 0, No synchronization
D6 (PWM sync) = 1, Synchronization on CSB positive edge
D7 (STOPen) = 0, STOP pin does not control the output 4.
D7 (STOPen) = 1, STOP pin controls the output 4.
D4, D3, D2 (MUX2, MUX1, MUX0) = 000, No current sense
D4, D3, D2 (MUX2, MUX1, MUX0) = 001, OUT1 current sense
D4, D3, D2 (MUX2, MUX1, MUX0) = 010,current sense
D4, D3, D2 (MUX2, MUX1, MUX0) = 011, OUT3 current sense
D4, D3, D2 (MUX2, MUX1, MUX0) = 100, OUT4 current sense
D4, D3, D2 (MUX2, MUX1, MUX0) = 101, OUT5 current sense
D4, D3, D2 (MUX2, MUX1, MUX0) = 110, External Switch current sense
D4, D3, D2 (MUX2, MUX1, MUX0) = 111, Temperature analog feedback
ADDRESS 00001 — Configuration OL
The Configuration OL register is used to enable the open
load detection for LEDs in Normal mode (OLLEDn in Table 8,
page 25) and to active the LED Control.
When bit D0 is set to logic [1], the open load detection
circuit for LED is activated for output 1. When bit D0 is set to
logic [0], open load detection circuit for standard bulbs is
activated for output 1.
When bit D5 is set to logic [1], the LED Control is activated
for output 1.
ADDRESS 00010 — CONFIGURATION PRESCALER
AND SR
Two configuration registers are available at this address.
The Configuration Prescaler when D9 bit is set to logic [0] and
Configuration SR when D9 bit is set to logic [1].
The Configuration Prescaler register is used to enable the
PWM clock prescaler per output. When the corresponding
PR bit is set to logic [1], the clock prescaler (reference clock
divided by 2) is activated for the dedicated output.
The SR Prescaler register is used to increase the output
slew-rate by a factor of 2. When the corresponding SR bit is
set to logic [1], the output switching time is divided by 2 for the
dedicated output.
ADDRESS 00011 — CONFIGURATION CSNS
The Configuration Current Sense register is used to
disable the high over-current shutdown phase (OCHI1 and
OCHI2 dynamic levels) in order to activate immediately the
current sense analog feedback.
When bit D9 is set to logic [1], the current sense
synchronization signal is reported on FETOUT output pin.
When the corresponding NO_OCHI bit is set to logic [1],
the output is only protected with OCLO level. And the current
sense is immediately available if it is selected through SPI, as
described in Figures 13. The NO_OCHI bit per output is
automatically reset at each corresponding ON off bit
transition from logic [1] to [0] and in case of over-temperature
or over-current fault. All NO_OCHI bits are also reset in case
of under-voltage fault detection.
ADDRESS 01001 — Control OUT1
Bits D9 and D8 control the switching phases as shown in
Table 10.
Table 10. Switching Phases
D9 : D8
PWM Phase
00
0°
01
90°
10
180°
11
270°
Bit D7 at logic [1] turns ON OUT1. OUT1 is turned OFF
with bit D7 at logic [0]. This register allows the master to
control the duty cycle and the switching phases of OUT1. The
duty cycle resolution is given by bits D6 : D0.
D7 = 0, D6 : D0 = XX output OFF.
35XS350
26
Analog Integrated Circuit Device Data
Freescale Semiconductor