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34825_10

更新时间： 2024-11-09 07:44:27

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		接口集成电路
页数	文件大小	规格书
39页	694K
描述
Micro-USB Interface IC

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34825_10 数据手册

Document Number: MC34825

Rev 2.0, 3/2010

Freescale Semiconductor

Advance Information

Micro-USB Interface IC

Supporting Universal Charging

Solution and Wired Accessories

34825

The 34825 is designed to support the Universal Charging Solution

(UCS) recommended by the OMTP (Open Mobile Terminal Platform),

as well as to use the same 5-pin micro or mini-USB connector for other

wired accessories. The 34825 supports various types of external power

supplies, such as a dedicated ac/dc adapter or a USB port, to charge

the battery. It has functions built in to identify the type of the power

supply, and sets low or high charging current, based on the current

capability of the power supply. The 34825 monitors the power supply,

and offers an up to 28 V of over-voltage protection (OVP) to the cell

phone against failed power supplies. The 34825 also contains analog

switches to multiplex the 5 pins, to support UART and high speed USB

data communication, mono or stereo audio headset with or without a

microphone and a cord remote controller, manufacturing or research-

and-development (R/D) test cables, and other accessories.

INTERFACE IC

(PB-FREE)

98ASA00037D

20-PIN QFN

ORDERING INFORMATION

The 34825 monitors both the VBUS status and the resistance

between the ID pin and the ground to identify the accessory being

plugged into the mini or micro-USB connector. A high-accuracy 5-bit

ADC is offered to distinguish 32 levels of ID resistance that are

assigned to buttons in a cord remote controller or to identification (ID)

resistors of accessories. After identifying the attached accessory, the

34825 sends an interrupt signal to a host IC and the host IC can

configure the analog switches via an I²C serial bus for further actions.

When the accessory is detached from the cell phone, an interrupt signal

is also sent to inform the host.

Temperature

Package

Device

Range (T )

3mm X 3mm

MC34825EP/R2

-40°C to 85°C

UTQFN

Features

• Identifies various types of power supplies to set low or high

battery-charging-current levels

• Supports 32 ID resistance values with a high accuracy 5-

bit ADC

• Internal power switch to offer OVP against up to 28 V

failed power supply input

• Supports stereo/mono headset with or without microphone

and remote controller with pure passive components

• Supports USB or UART R/D test cables

• High speed (480 Mbps) USB 2.0 compliant

• Accessory attachment and detachment detection with an

interrupt signal to the host IC

• I²C interface

• 10 μA quiescent current in Standby mode

• Pb-free packaging designated by suffix code EP

Baseband

GPIO

34825

VDDIO

INT

I2C_SDA

I2C_SCL

RXD

VDD

Charger

LI+

I2C

UART

ISET

TXD

OUT

D+

D-

VBUS

BUS

USB XCVR

SPK_L

SPK_R

MIC

AUDIO

D+

D-

GND

USB Connector

Figure 1. 34825 Simplified Application Diagram

* This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

12 3 4 5 6 7...39

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