ADP5350ACBZ-1-R7 datasheet(35/63 Pages) AD

35 / 63 page

Data Sheet

ADP5350

Rev. B | Page 35 of 63

I2C INTERFACE

The ADP5350 includes an I2C-compatible serial interface to

control the battery charging, fuel gauge, boost regulator, and

LED driver, and to read back the system status.

I2C ADDRESSES

The I2C address can be factory programmable. The I2C address

options help to avoid conflicts with other I2C slave chipsets in

the system. For alternative I2C chip address requirements,

contact a local Analog Devices sales or distribution

representative.

SDA AND SCL PINS

The ADP5350 has two dedicated I2C interface pins, SDA and

SCL. SDA is an open-drain line for receiving and transmitting

data. SCL is an input line for receiving the clock signal. Pull up

these pins to an external input/output supply using external

resistors.

Serial data is transferred on the rising edge of SCL. The read

data is generated at the SDA pin in read mode.

The subaddress content selects the ADP5350 registers to be

written to first. The ADP5350 sends an acknowledgement to the

master after the 8-bit data byte is written (see Figure 55 for an

example of the I2C write sequence to a single register). The

ADP5350 increments the subaddress automatically and starts

receiving a data byte at the next register until the master sends

an I2C stop as shown in Figure 56.

Figure 57 shows the I2C read sequence of a single register. The

ADP5350 sends the data from the register denoted by the

subaddress and increments the subaddress automatically,

sending data from the next register until the master sends an

I2C stop condition as shown in Figure 58.

DEFAULT RESET

The ADP5350 contains one write only register, DEFAULT_SET,

to reset all registers to the factory default values.

Figure 55. I2C Single Register Write Sequence

Figure 56. I2C Multiple Register Write Sequence

Figure 57. I2C Single Register Read Sequence

Figure 58. I2C Multiple Register Read Sequence

SUBADDRESS

CHIP ADDRESS

ADP5350 RECEIVES

DATA

0 = WRITE

MASTER STOP

CHIP ADDRESS

SUBADDRESS

ADP5350 RECEIVES

DATA TO REGISTER N

ADP5350 RECEIVES

DATA TO REGISTER N + 1

ADP5350 RECEIVES

DATA TO LAST REGISTER

0 = WRITE

MASTER STOP

CHIP ADDRESS

SUBADDRESS

CHIP ADDRESS

ADP5350 SENDS DATA

0 = WRITE

1 = READ

CHIP ADDRESS

SUBADDRESS

CHIP ADDRESS

ADP5350 SENDS

DATA OF REGISTER N

ADP5350 SENDS

DATA OF REGISTER

N + 1

ADP5350 SENDS

DATA OF LAST

0 = WRITE

1 = READ

MASTER STOP

ADP5350ACBZ-1-R7 Datenblatt(PDF) 35 Page - Analog Devices

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