FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
A logic [1] on bit D3 (OCHI_s bit) the OCHI1 level is
replaced by OCHI2 during tOC1, as shown Figure 14.
Xenon bit set to logic [0]:
I
OCH1
I
OCH1
I
OCH2
I
OCH2
I
I
OC1
OC2
I
OC1
OC2
OC3
OC4
OCLO4
OCLO3
OCLO2
OCLO1
I
I
I
I
I
I
OCLO4
OCLO3
OCLO2
OCLO1
I
I
I
I
I
Time
t
t
t
t
OC7
t
OC3
OC1
t
t
OC5
OC6
OC4
Time
t
t
t
t
OC7
t
OC3
OC2
OC1
t
OC5
OC6
OC4
t
OC2
Xenon bit set to logic [1]:
Figure 14. Over-current profile with OCHI bit set to ‘1’
I
The wire harness is protected by one of four possible
current levels in steady state, as defined in Table 18.
OCH1
OCH2
I
I
I
I
I
OC1
OC2
OC3
OC4
Table 18. Output Steady State Selection
OCLO1 (D2) OCLO0 (D1)
Steady State Current
I
I
I
I
OCLO4
OCLO3
OCLO2
OCLO1
0
0
1
1
0
1
0
1
OCLO2 (default)
OCLO3
OCLO4
Time
t
t
t
t
OC7
t
OC3
OC1
t
t
OC5
OC6
OC4
OCLO1
OC2
Bit D0 (OC_mode_sel) allows to select the over-current
mode, as described Table 19.
Figure 13. Over-current profile depending on Xenon bit
D[7:6] bits allow to MCU to programmable bulb cooling
curve and D[5:4] bits inrush curve for selected output, as
shown Table 16 and Table 17.
Table 19. Over-current Mode Selection
OC_mode_s (D0)
Over-current Mode
Table 16. Cooling Curve Selection
0
1
only inrush current management (default)
BC1_s (D7)
BC0_s (D6)
Profile Curves Speed
inrush current and bulb cooling
management
0
0
1
1
0
1
0
1
medium (default)
slow
ADDRESS 00101—GLOBAL CONFIGURATION
REGISTER (GCR)
fast
medium
The GCR register allows the MCU to configure the device
through the SPI.
Table 17. Inrush Curve Selection
Bit D8 allows the MCU to enable or disable the VDD failure
detector. A logic [1] on VDD_FAIL_en bit allows transitioning
to Fail-safe mode for VDD < VDD(FAIL).
OC1_s (D5)
OC0_s (D4)
Profile Curves Speed
slow (default)
fast
0
0
1
1
0
1
0
1
Bit D7 allows the MCU to enable or disable the PWM
module. A logic [1] on PWM_en bit allows control of the
outputs HS[0:3] with PWMR register (the direct input states
are ignored).
medium
very slow
Bit D6 (CLOCK_sel) allows to select the clock used as
reference by PWM module, as described in the following
Table 20.
10XS3412
Analog Integrated Circuit Device Data
Freescale Semiconductor
36
FREESCALE [ Freescale ]
