STCF04TBR Datasheet, PDF (27/43 Pages) STMicroelectronics – High power white LED SuperCap™ driver with I²C interface

STCF04
Description of the internal registers
Table 18. Status register details
Bit name
F_RUN
(STAT_REG)
FL_R
NTC_W
(STAT_REG)
NTC_H
(STAT_REG)
OT_F
(STAT_REG)
FL_OVR
LTH
Default value
0
0
0
Latched ⁽¹⁾
NO
NO
YES
Forces Idle
mode when set
NO
NO
NO
Sets ATN LOW
when set
NO
YES
YES
0
YES
YES
YES
0
YES
YES
YES
0
0
NO
NO
NO
NO
YES
NO
1. YES means that the bit is set by internal signals and is reset to default by an I²C read operation of STAT_REG. NO means
that the bit is set and reset by internal signals in real-time.
9.5
Feature (FTR_REG) 04(hex)
Table 19. Feature register
LS_REG
(Write mode)
MSB
SUB ADD=04
IDC_0
N/A
VDC_1 VDC_0 EN_LS
Power-ON, Shutdown
mode RESET value
0
0
0
0
0
LS_2
0
LS_1
0
LSB
LS_0
0
LS_0~2: these 3 bits define the value of the internal reference voltage for the light sensor
comparator. The EN_LS bit must be set to 1 to activate the internal reference for the light
sensor comparator.
EN_LS: this bit enables the light sensor function when set HIGH.
Table 20. Light sensor reference dimming register settings
LS_DIM(hex)
0
1
2
3
4
LSREF[mV]
200
400
600
800
1000
5
1200
6
1400
7
1600
VDC_0~1: these 2 bits define the output voltage of the DC-DC converter.
Table 21.
DC-DC converter output voltages (V_OUT)
VDC_1
VDC_0
0
0
0
1
1
0
V_OUT
4.5 V
5.0 V
5.5 V
Note:
See Section 10.4.
IDC_0: this bit defines the peak current limit value of the DC-DC converter.
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