LP87332D datasheet(37/74 Pages) TI1

37 / 74 page

R/W

Bit 0

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 7

Bit 6

MSB

LSB

C Slave Address (chip address)

ack from slave

start

MSB Chip Addr LSB

SCL

ack from slave

MSB Register Addr LSB

MSB

Data

LSB

stop

ack from slave

nack from master

repeated start

data from slave

SDA

start

id =60h

w ack

address = 3Fh

ack

r ack

address 3Fh data

nack

stop

MSB Chip Address LSB

id = 60h

LP87332D

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SNVSAU6 – NOVEMBER 2017

Product Folder Links: LP87332D

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Programming (continued)

When READ function is to be accomplished, a WRITE function must precede the READ function as shown above.

Figure 23. Read Cycle (r = read; SDA = 1). Example Device Address = 0x60

7.5.1.4 I2C-Compatible Chip Address

NOTE

The device address for the LP87332D is 0x60.

After the START condition, the I2C master sends the 7-bit address followed by an eighth bit, read or write (R/W).

R/W = 0 indicates a WRITE and R/W = 1 indicates a READ. The second byte following the device address

selects the register address to which the data is written. The third byte contains the data for the selected register.

Here in an example with device address of 1100000Bin = 60Hex.

Figure 24. Device Address Example

7.5.1.5 Auto-Increment Feature

The auto-increment feature allows writing several consecutive registers within one transmission. Every time an 8-

bit word is sent to the LP87332D, the internal address index counter is incremented by one and the next register

is written. Table 6 shows writing sequence to two consecutive registers. Note that auto-increment feature does

not work for read.

Table 6. Auto-Increment Example

MASTER

ACTION

START

DEVICE

ADDRES

S = 0x60

WRITE

ADDRESS

DATA

STOP

LP87332

ACK

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