AS1181 datasheet(39/92 Pages) AMSOSRAM

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AS1181

Functional description

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DS001139 • v3-00 • 2026-Apr-01

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Bit

Source

Severity

Interrupt

type

Description

supply_undervoltage

Critical

Level

Undervoltage error on VP18 or VLED

Interrupt is set when there is an undervoltage error on

VP18 or VLED.

Thresholds:

VLED UV 2.3 - 2.5V

VP18 UV 1.72V

lp_short_open_error

Critical

Pulse/

level

LP short or open failure (BIST & continuous check)

The LP node (Anode of LEDs) is checked during BIST and

in continuous operation for any shortcut or open condition.

If this interrupt is set it is indicating wrong/malfunctioned

LED connection.

ln_short_open_error

Critical

Pulse/

level

LN short or open failure (BIST & continuous check)

The LN node (Cathode of LEDs) is checked during BIST

and in continuous operation for any shortcut or open

condition. If this interrupt is set it is indicating

wrong/malfunctioned LED connection.

idrive_feedback_error

Critical

Level

Digital vs. analog current comparison failure

Digital Feedback from current set DAC. Readback of 10-bit

current value and compared with programmed target

value. Checking if any DAC bit got stuck.

otp_test

Critical

Pulse

OTP read check error

Device checking if register content equals OTP content to

verify if OTP default settings are loaded correctly.

ram_bist

Critical

Pulse

RAM BIST error

RAM of device checked during start-up BIST

rom_bist

Critical

Pulse

ROM BIST error

ROM of device checked during start-up BIST

Not used

AS1181 Datasheet(PDF) 39 Page - ams-OSRAM AG

AS1181 Datasheet(HTML) 39 Page - ams-OSRAM AG

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