RT5028 datasheet(13/40 Pages) RICHTEK

13 / 40 page

DS5028-02

September 2016

www.richtek.com

RT5028

is a registered trademark of Richtek Technology Corporation.

Read Function

Reading One Indexed Byte of Data from RT (With 1-Byte)

Application Information

The RT5028 is a highly-integrated solution for industrial

system including PMIC and memory system. The RT5028

application mechanism and I2C compatible interface are

introduced in later sections. The system's slave address

is 0110111 (As SADDR = high) or 0111111(As SADDR =

low).

PMIC - Power management system provides 8 low dropout

linear regulator and 4 high efficiency synchronous step-

down DC-DC converters. Power-On and Power-Off

sequences are control by PWRON and RESET input pins.

Slave Address

Data Byte

R/W

Acknowledge from RT

Acknowledge from Master

Slave Address

Acknowledge from RT

Repeated Start

R/W

1Byte

Reading n Indexed Words of Data from RT (With N-Byte)

Slave Address

Data Byte

Acknowledge from RT

Acknowledge from Master

Slave Address

Acknowledge from RT

Repeated Start

Data Byte

Acknowledge from Master

……

R/W

1st Byte

2nd Byte

(n-1)th Byte

nth Byte

Detail time sequence control is described in Power ON/

OFF diagram. The I2C interface can program individual

regulator output voltage as well as on/off control and

voltage setting.

I2C Interface Timing Diagram

The RT5028 acts as an I

2C -bus slave. The I2C-bus master

configures the settings for all function blocks by sending

command bytes to the RT5028 via the 2-wire I

2C-bus. The

2C timing diagrams are list in the following.

Write Function

Writing One Byte of Data to RT (With 1-Byte)

Slave Address

Data Byte

R/W

Acknowledge from RT

1Byte

Writing n Bytes of Data to RT (With N-Byte)

Slave Address

Data Byte

Acknowledge from RT

R/W

(n-1)th Byte

nth Byte

Data Byte

1st Byte

Acknowledge from RT

Data Byte

2nd Byte

…

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