LP8545 datasheet(29/44 Pages) TI1

29 / 44 page

LP8545

www.ti.com

SNVS635D – APRIL 2010 – REVISED DECEMBER 2013

Table 3. EEPROM Memory Map

ADDR

A0H

eeprom addr 0

CURRENT[7:0]

A1H

eeprom addr 1

BOOST_FREQ[1:0]

EN_LED_

TEMP_LIM[1:0]

SLOPE[2:0]

FAULT

A2H

eeprom addr 2

ADAPTIVE_SPEED[1:0]

ADV_SLO

EN_EXT_F

EN_ADAPT

EN_BOOST

BOOST_MAX[1:0]

A3H

eeprom addr 3

UVLO[1:0]

EN_PSP

PWM_FREQ[4:0]

A4H

eeprom addr 4

PWM_RESOLUTION[1:

EN_I_RE

LED_FAULT_THR[1:0]

DRV_HEADR[2:0]

A5H

eeprom addr 5

EN_VSY

DITHER[1:0]

VBOOST[4:0]

A6H

eeprom addr 6

PLL[12:5]

A7H

eeprom addr 7

PLL[4:0]

EN_F_RES

HYSTERESIS[1:0]

Brightness Control

Address 00h

Reset value 0000 0000b

Brightness Control register

BRT[7:0]

Name

Bit

Access

Description

BRT

7:0

R/W

Backlight PWM 8-bit linear control.

Device Control

Address 01h

Reset value 0000 0000b

Device Control register

BRT_MODE[1:0]

BL_CTL

Name

Bit

Access

Description

BRT_MODE

2:1

R/W

PWM source mode

00b = PWM input pin duty cycle control (default)

01b = PWM input pin duty cycle control

10b = Brightness register

11b = Direct PWM control from PWM input pin

BL_CTL

R/W

Enable backlight

0 = Backlight disabled and chip turned off if BRT_MODE[1:0] = 10. In external PWM

pin control the state of the chip is defined with the PWM pin and this bit has no

effect.

1 = Backlight enabled and chip turned on if BRT_MODE[1:0] = 10. In external PWM

pin control the state of the chip is defined with the PWM pin and this bit has no

effect.

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