EP7209 datasheet(3/128 Pages) CIRRUS

3 / 128 page

EP7209

OVERVIEW (cont.)

DS453PP2

Power Management

The EP7209 is designed for ultra-low-power opera-

tion. Its core operates at only 2.5 V, while its I/O has

an operation range of 2.5 V-3.3 V. Through careful

design, Cirrus Logic has achieved extremely low

power consumption with the EP7209. This is

achieved by using a combination of dynamically

adjustable core clock frequencies, low power states

utilized during periods of inactivity, and fully static

design principles. For example, when decompressing

MPEG 1 layer 3 music data with sample rates of

44.1 kHz and 128 kbits/sec, the EP7209 consumes

less than 87 mW. At sampling frequencies of

22.05 kHz and 64 kbits/sec, power consumption falls

to 50 mW.

Audio Data Memory Interfaces

The EP7209 connects directly to both on-system

FLASH memory and to removable FLASH memory-

cards. The generality of the external interface on the

EP7209 allows for the use of a wide variety of addi-

tional memory types for compressed audio data stor-

age.

LCD Interface

The EP7209 interfaces directly to a single-scan panel

monochrome LCD display. For portable digital audio

player applications that require LCDs, a 128 kbyte

display buffer is provided.

Data Download

The EP7209 along with minimal glue logic can con-

nect to a PC through the parallel port. This enables

downloading of compressed music or data from a PC

to an EP7209-based portable digital audio player.

The EP7209 can also be connected to industry stan-

dard USB slave devices through an external inter-

face. The power of the EP7209 coupled with the

36 MHz external data bus ensures that the EP7209

can support rapid transfer of compressed audio data

over a USB interface.

The EP7209 also includes a built-in 115.2 kbps IrDA

SIR protocol encoder/decoder that can be used to

drive an infrared communication interface to down-

load the data.

Digital Audio Interface

The EP7209 integrates an DAI interface to enable a

direct connection to many low cost, low power, high

quality audio converters. In particular, the DAI inter-

face can be used to drive the Crystal CS43L41 / 42 /

43 low power audio DACs and the Crystal CS53L32

low power audio ADC. Some of these devices feature

digital bass and treble boost, digital volume control

and compressor-limiter functions.

Packaging

The EP7209 is available in a 208-pin LQFP package

and a 256-ball PBGA package.

System Design

As shown in the system block diagram, simply adding

FLASH memory, an LCD, an audio DAC, and some

discrete components, a complete low power digital

audio player system can be made. (See the following

illustration).

Contacting Cirrus Logic Support

For a complete listing of Direct Sales, Distributor, and Sales Representative contacts, visit the Cirrus Logic web site at:

http://www.cirrus.com/corporate/contacts/

Preliminary product information describes products which are in production, but for which full characterization data is not yet available. Advance product infor-

mation describes products which are in development and subject to development changes. Cirrus Logic, Inc. has made best efforts to ensure that the information

contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided “AS IS” without warranty of

any kind (express or implied). No responsibility is assumed by Cirrus Logic, Inc. for the use of this information, nor for infringements of patents or other rights

of third parties. This document is the property of Cirrus Logic, Inc. and implies no license under patents, copyrights, trademarks, or trade secrets. No part of

this publication may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or

otherwise) without the prior written consent of Cirrus Logic, Inc. Items from any Cirrus Logic website or disk may be printed for use by the user. However, no

part of the printout or electronic files may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical,

photographic, or otherwise) without the prior written consent of Cirrus Logic, Inc.Furthermore, no part of this publication maybe used as a basis for manufacture

or sale of any items without the prior written consent of Cirrus Logic, Inc. The names of products of Cirrus Logic, Inc. or other vendors and suppliers appearing

in this document may be trademarks or service marks of their respective owners which may be registered in some jurisdictions. A list of Cirrus Logic, Inc. trade-

marks and service marks can be found at http://www.cirrus.com.

EP7209 Datasheet(PDF) 3 Page - Cirrus Logic

EP7209 Datasheet(HTML) 3 Page - Cirrus Logic

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 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL