34825 datasheet(27/39 Pages) FREESCALE

Part #	34825

Description	Micro-USB Interface IC Supporting Universal Charging Solution and Wired Accessories

PDF	39 Pages

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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27 / 39 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

34825

FUNCTIONAL DEVICE OPERATION

I2C SERIAL BUS INTERFACE

the charge current. By using ISET output, the charger IC can

use two external resistors in parallel to set two charge current

levels, as shown in Figure 27.

I2C SERIAL BUS INTERFACE

The I2C bus is enabled in the Standby, the Power Save,

and the Active modes. The serial clock (SCL) and the serial

data (SDA) lines must be connected to a positive supply

using pull-up resistors. Internally the I2C bus voltage is

referenced to the VDDIO input. The 34825 is a slave device.

Maximum data rate is 400 kbps.

ADDRESSING AND PROTOCOL

The 7-bit address for the 34825 is 0100101, as shown in

Figure 22.

R/W

Figure 22. I2C Slave Address

The following three figures show three I2C-bus transaction

protocols. The Word Address is an 8-bit register address in

the 34825.

Figure 23. Master Transmits to Slave (Write Mode)

Figure 24. Master Reads After Setting Word Address (Write Word Address and then Read Data)

34825 Datasheet(PDF) 27 Page - Freescale Semiconductor, Inc