LP8556 datasheet(35/52 Pages) TI

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LP8556

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SNVS871B – JULY 2012 – REVISED SEPTEMBER 2012

IDENTIFICATION

Address 03h

Reset value 1111 1100b

Identification register

PANEL

MFG[3:0]

REV[2:0]

Name

Bit

Access

Description

PANEL

Panel ID code

MFG

6:3

Manufacturer ID code

REV

2:0

Revision ID code

DIRECT CONTROL

Address 04h

Reset value 0000 0000b

Direct Control register

OUT[5:0]

Name

Bit

Access

Description

OUT

5:0

R/W

Direct control of the LED outputs

0 = Normal operation. LED output are controlled with the adaptive dimming block

1 = LED output is forced to 100% PWM.

LED String Enable

Address 16h

Reset value 0011 1111b

Temp LSB register

LED_EN[5:0]

Name

Bit

Access

Description

LED_EN

5:0

R/W

Bits 5:0 correspond to LED Strings 6:1 respectively.

Bit value 1 = LED String Enabled

Bit value 0 = LED String Disabled

Note: To disable string(s), it is recommended to disable higher order string(s). For

example, - for 5 String configuration, disable 6th String. - for 4 string configuration,

disable 6th and 5th string. These bits are ANDed with the internal LED enable bits

that are generated with the PS_MODE logic.

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