STCF05 datasheet(22/33 Pages) STMICROELECTRONICS

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Registers description

STCF05

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Doc ID 15257 Rev 4

9.7

FDIM_0~2

These 3 bits define the LED current in flash mode in 8 exponential steps. Max current value

in flash mode is 400 mA.

9.8

LDIM

Is an internal dimming register. It cannot be accessed by the user directly. The LDIM value is

determined by the TDIM and FDIM registers. The total number of dimming steps is 13,

because flash and torch current values are overlapping. See Table 14 below.

9.9

AUXI_0~3

This 4 bits register defines the AUX LED current from 0 to 20 mA. See AUX LED Dimming

Table for reference. Loading any value between 1 and 15 also starts the AUX LED current

source timer, if enabled. The AUX LED current source is active only in ready mode, and is

deactivated in any other mode.

Figure 12.

Current intensity vs. dimming value

120

160

200

240

280

320

360

400

dimming steps

120

160

200

240

280

320

360

400

dimming steps

Table 12.

Auxiliary register

AUX_REG

(write mode)

MSB

LSB

SUB ADD=02

AUXI_3

AUXI_2

AUXI_1

AUXI_0

AUXT_3

AUXT_2

AUXT_1

AUXT_0

Power ON,

SHUTDOWN MODE

RESET Value

000

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