Examples of register setup for each mode

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Doc ID 15047 Rev 1

8.2

Example 2: 15 mA torch

The value of TDIM (4 bits) must be set to 0x0 to set-up the current source to the chosen

value.

The PWR_ON bit of the command register must be set to 1.

The TRIG_EN bit of the command register must be set to 1.

The TCH_ON bit of the command register must be set to 0.

The NTC_ON bit of the command register can be set to any value because NTC is

automatically ON when the torch mode is active. Setting this bit to 0 will not switch off the

NTC.

Four bytes must be written to the STCF05 to run the torch mode.

The duration of the torch mode is "unlimited". Torch mode is terminated by setting the

TCH_ON bit in the COMMAND register to 0.

Termination of the torch mode can be done by writing the following data to the STCF05.

Terminating torch mode puts the STCF05 into READY mode.

Table 15.

COMMAND register data for torch mode

CMD_REG

PWR_ON

TRIG_EN

TCH_ON

NTC_ON

FTIM_3

FTIM_2

FTIM_1

FTIM_0

1011

0000

MSB

LSB

Table 16.

DIMMING register data for torch mode

DIM_REG

N/A

TDIM_2

TDIM_1

TDIM_0

N/A

FDIM_2

FDIM_1

FDIM_0

0000

0000

MSB

LSB

Table 17.

I²C data packet to activate torch mode

Byte

Hex

Binary

Comment

1

62

01100010

Device address + R/W bit

2

00

00000000

Command register address

3

B0

10110000

Data of the command register

4

00

00000000

Data of the dimming register

Table 18.

I²C data packet for terminating torch mode

Byte

Hex

Binary

Comment

1

62

01100010

Device address + R/W bit

2

00

00000000

Command register address

3

80

10000000

Data of the command register