34844 datasheet(21/37 Pages) FREESCALE

Part #	34844

Description	10 Channel LED Backlight Driver with Integrated Power Supply

PDF	37 Pages

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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Analog Integrated Circuit Device Data

Freescale Semiconductor

34844

FUNCTIONAL DEVICE OPERATION

LOGIC COMMANDS AND REGISTERS

Table 7. Register Description

DEFAULT VALUE

(HEX)

DESCRIPTION

Chip Enable by software. This signal is ‘OR’ed with external EN (0=off, 1 =on)

PINEN

PIN pin enable (0=off, 1 =on)

NINEN

NIN pin enable (0=off, 1 =on)

OVP[3:0]

OVP voltage

SETI2C

SET I2C communication (Disable SM-Bus Mode)

CLRI2C

Clear set I2C

FPWM[17:0]

300

PWM Frequency

DPWM[7:0]

PWM Duty Cycle (FFh =100%)

CHEN[9:0]

3FF

Channel Enable (0=off, 1=on)

ALL_OFF

All 10 channels OFF at the same. In order to reactivate channels this bit should be clear.

CLRFAIL

Clear fail if channels are re-enable.

STRB

Strobe MODE (0=Parallel, 1=Strobe)

BST[1:0]

Boost Frequency (150,300,600,1200 kHz) [0h=150Hz]

ICH#[7:0]

Channel Current Program (FFh = Maximum Current)

ICHG[7:0]

Global Current Program

34844 Datasheet(PDF) 21 Page - Freescale Semiconductor, Inc