LP87322ESLASHF datasheet(37/75 Pages) TI1

37 / 75 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

LP87322B-Q1, LP87322D-Q1, LP87322E-Q1, LP87322F-Q1

www.ti.com

SNVSAC5 – SEPTEMBER 2017

Product Folder Links: LP87322B-Q1 LP87322D-Q1 LP87322E-Q1 LP87322F-Q1

Submit Documentation Feedback

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

8.5.1.4 I2C-Compatible Chip Address

NOTE

The device address for the LP87322B/D/E/F-Q1 is 0x61.

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

8.5.1.5 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 LP87322B/D/E/F-Q1, 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 = 0x61

WRITE

ADDRESS

DATA

STOP

LP87322

B/D/E/F-

ACK

LP87322E/F Datasheet(PDF) 37 Page - Texas Instruments

LP87322E/F Datasheet(HTML) 37 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75

Datasheet Download

Link URL