LP8553 datasheet(29/41 Pages) TI2

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LP8553

www.ti.com

SNVS701B – SEPTEMBER 2011 – REVISED JANUARY 2014

Direct Control register

OUT

5:0

R/W

Direct control of the LED outputs

0 = Normal operation. LED output are controlled with PWM.

1 = LED output is forced to 100% PWM.

Temp MSB

Address 05h

Reset value 0000 0000b

Temp MSB register

TEMP[10:3]

Name

Bit

Access

Description

TEMP

7:0

Device internal temperature sensor reading first 8 MSB. MSB must be read before LSB,

because reading of MSB register latches the data.

Temp LSB

Address 06h

Reset value 0000 0000b

Temp LSB register

TEMP[2:0]

Name

Bit

Access

Description

TEMP

7:5

Device internal temperature sensor reading last 3 LSB. MSB must be read before LSB,

because reading of MSB register latches the data.

EEPROM Control

Address 72h

Reset value 0000 0000b

EEPROM Control register

EE_READY

EE_INIT

EE_PROG

EE_READ

Name

Bit

Access

Description

EE_READY

EEPROM ready

0 = EEPROM programming or read in progress

1 = EEPROM ready, not busy

EE_INIT

R/W

EEPROM initialization bit. This bit must be written 1 before EEPROM read or

programming.

EE_PROG

R/W

EEPROM programming.

0 = Normal operation

1 = Start the EEPROM programming sequence. EE_INIT must be written 1 before

EEPROM programming can be started. Programs data currently in the EEPROM

registers to non volatile memory (NVM). Programming sequence takes about 200

ms. Programming voltage is generated inside the chip.

EE_READ

R/W

EEPROM read

0 = Normal operation

1 = Reads the data from NVM to the EEPROM registers. Can be used to restore

default values if EEPROM registers are changed during testing.

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