LP8555 datasheet(32/64 Pages) TI1

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LP8555

SNVS857 – FEBRUARY 2014

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8.5.2 STATUS/MASK

Address: 0x01/0x02

DRV_FAULT

DRV_OV

—

BST_UV

BST_OVP

BST_OCP

TSD

UVLO

Bits

Field

Type

Description

An open/short condition was detected on one or more LED strings. Once set this bit will stay set until the

LED_OPEN

R/O

STATUS register is read. An LED open/short condition will turn off the backlight when CONFIG.AUTO is

An overvoltage condition was detected on one or more LED strings. Once set this bit will stay set until

LED_OV

R/O

the STATUS register is read.

reserved

R/O

The boost reported an undervoltage condition. Once set this bit will stay set until the STATUS register is

BST_UV

R/O

read.

The boost reported an overvoltage protection condition when the maximum allowed voltage is

BST_OVP

R/O

requested. Once set this bit will stay set until the STATUS register is read.

BST_OCP

R/O

The boost reported an undervoltage condition longer than 50 ms in time when the backlight on.

A thermal shutdown condition was detected. Once set this bit will stay set until the STATUS register is

TSD

R/O

read. A thermal shutdown condition will turn off the backlight.

An undervoltage lockout condition was detected. Once set this bit will stay set until the STATUS register

UVLO

R/O

is read. An undervoltage lockout condition will turn off the backlight.

Each fault bit of the STATUS register has a corresponding bit in the MASK register, which enables interrupts for

the fault. For example, an interrupt will occur if the MASK.BST_UV and STATUS.BST_UV bits are both set. If a

fault bit is cleared in the MASK register then that fault will not trigger an interrupt.

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