STEVAL-TLL004V1 STMicroelectronics, STEVAL-TLL004V1 Datasheet - Page 20

• Manufacturer Part Number: STEVAL-TLL004V1
• Description: BOARD EVAL FLASH DRIVER STCF03
• Manufacturer: STMicroelectronics

Specifications of STEVAL-TLL004V1

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8431

Description of internal registers
8
Table 9.
Table 10.
8.1
8.2
8.3
8.4
20/35
SUB ADD=00
RESET Value
(write mode)
CMD_REG
Power ON
Register name
STAT_REG
CMD_REG
AUX_REG
DIM_REG
Description of internal registers
I²C register mapping function
Command register
PWR_ON
When set, it activates all analog and power internal blocks including the NTC supporting
circuit, and the device is ready to operate (ready mode). As long as PWR_ON=0, only the
I²C interface is active, minimizing stand-by mode power consumption.
TRIG_EN
This bit is AND-ed with the TRIG pin to generate the internal signal FL_ON that activates
flash mode. By this way, both soft-triggering and hard-triggering of the flash are made
possible. If soft-triggering (through I²C) is chosen, the TRIG pin is not used and must be
kept HIGH (VI). If hard-triggering is chosen, then the TRIG pin has to be connected to a
microprocessor I/O devoted to flash timing control, and the TRIG_EN bit must be set in
advance. Both triggering modes can benefit of the internal flash time counter, that uses the
TRIG_EN bit and can work either as a safety shut-down timer or as a flash duration timer.
Flash mode can start only if PWR_ON=1. LED current is controlled by the value set by the
FDIM_0~3 of the DIM_REG.
TCH_ON
When set from ready mode, the STCF03 enters the torch mode. The LED current is
controlled by the value set by the TDIM_0~3 of the DIM_REG.
NTC_ON
In ready mode, the comparators that monitor the LED temperature are activated if NTC_ON
bit is set. NTC-related blocks are always active regardless of this bit in torch mode and flash
mode.
PWR_ON
MSB
0
TRIG_EN
0
TCH_ON
SUB ADDRESS (hex)
Doc ID 13169 Rev 7
0
00
01
02
03
NTC_ON
0
FTIM_3
0
FTIM_2
0
Operation
R only
R / W
R / W
R / W
FTIM_1
0
FTIM_0
STCF03
LSB
0