LM2756 datasheet(12/24 Pages) TI2

12 / 24 page

bit7

62A

bit6

53A

bit5

SD62

bit4

SD53

bit3

ENC

bit2

ENB

bit1

ENA

bit0

MSB

LSB

ADR6

bit7

ADR5

bit6

ADR4

bit5

ADR3

bit4

ADR2

bit3

ADR1

bit2

ADR0

bit1

R/W

bit0

MSB

LSB

C Slave Address (chip address)

start

msb Chip Address lsb

ack

msb Register Add lsb

ack

msb

DATA

lsb

ack

stop

ack from slave

SCL

SDIO

start

Id = 36h

ack

addr = 10h

ack

DGGUHVV K¶06 data

stop

LM2756

SNVS504C – JULY 2007 – REVISED MAY 2013

www.ti.com

w = write (SDIO = "0")

r = read (SDIO = "1")

ack = acknowledge (SDIO pulled down by either master or slave)

id = chip address, 36h for LM2756

Figure 20. Write Cycle

I2C Compatible Chip Address

The chip address for LM2756 is 0110110, or 36h.

Figure 21. Chip Address

Internal Registers of LM2756

Internal Hex Address

Power On Value

General Purpose Register

10h

0000 0000

Group A Brightness Control Register

A0h

1110 0000

Group B Brightness Control Register

B0h

1111 1000

Group C Brightness Control Register

C0h

1111 1000

Ramp Step Time Register

20h

1111 0000

VF Monitor Delay Ragister

60h

1111 1100

Figure 22. General Purpose Register Description

Internal Hex Address: 10h

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