AS1170 datasheet(43/53 Pages) AMSOSRAM

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AS1170

Datasheet

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8.10

Minimum LED current register

Table 16: Minimum LED current register

Addr: Eh

Minimum LED current register

Bit

Bit name

Default

Access

Bit description

7:0

led_current_min (2)(3)(4)

00h

Minimum current through the current sink (only

including all current reductions as described in

Current Reduction by VIN measurements in Flash

Mode.

(1) This register reports the minimum LED current from the last operation cycle.

(2) Only the current through LED_OUT1 is reported.

(3) As the internal change of this register is asynchronous to the readout, it is recommended to readout the register after the flash

pulse. The register will store the minimum current through the LED after e.g. a previous flash. This current can be used for a

subsequent flash pulse for a safe operating range.

(4) This register is only set if an actual current reduction happens (fault_uvlo=1) otherwise led_current_min=0.

8.11

Actual LED current register

Table 17: Actual LED current register

Addr: Fh

Actual LED current register

Bit

Bit name

Default

Access

Bit description

7:0

led_current_actual (2)(3)

00h

Actual set current through the current sink

(including all current reductions as described in

Flash Current Reductions including LED current

ramp up/down).

(1) This register reports the actual set LED current.

(2) Only the current through LED_OUT1 is reported.

(3) As the internal change of this register is asynchronous to the readout, it is recommended to readout the register twice and

compare the results.

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