AN3223

Examples of register setup for each mode

Doc ID 17553 Rev 2

25/29

10

Examples of register setup for each mode

10.1

Example 1: 10 A FLASH with 30 ms duration

The value of FDIM (3 bits) must be set to 0x7. The value of FTIM (5 bits) must be set to 0x6.

Bit PWR_ON must be set to 1.

Bit FLASH_ON must be set to 1.

Bit TCH_ON must be set to 0.

Bit NTC_ON can be set to any value, because NTC is automatically ON when Flash mode is

active. Setting this bit to 0 does not switch off the NTC.

It is necessary to write 4 bytes to the STCF04 to make a FLASH.

10.2

Example 2: 60 mA Torch with 10 s duration

The value of TDIM (4 bits) must be set to 0x4 to setup the current source to 60 mA.

Bit PWR_ON must be set to 1.

Bit FLASH_ON must be set to 0.

Bit TCH_ON must be set to 1.

Bit NTC_ON can be set to any value, because NTC is automatically ON, when Torch mode

is active. Setting this bit to 0 does not switch off the NTC.

Table 13.

COMMAND register data for entering Flash mode

CMD_REG

PWR_ON

FLASH_ON

TCH_ON

NTC_ON

TCHV_H

CHRG

MONTR

N/A

1

1

000000

MSB

LSB

Table 14.

FLASH register data

FL_REG

FTIM_4

FTIM_3

FTIM_2

FTIM_1

FTIM_0

FDIM_2

FDIM_1

FDIM_0

0

011

011

1

MSB

LSB

Table 15.

I²C data packet for activation of Flash mode

Byte

Hex

Binary

Comment

1

62

01100000

Device address + R/W bit

2

00

00000000

COMMAND register address

3

C1

11000000

Data of the COMMAND register

4

37

00110111

Data of the FLASH register