EP7312-CR-90 datasheet(2/64 Pages) CIRRUS

Part #	EP7312-CR-90

Description	HIGH-PERFORMANCE, LOW-POWER SYSTEM ON CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE

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Manufacturer	CIRRUS [Cirrus Logic]

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©Copyright Cirrus Logic, Inc. 2003

DS508PP5

EP7312

High-Performance, Low-Power System on Chip

FEATURES (cont)

I 48 KBytes of on-chip SRAM

I MaverickKey™ IDs

— 32-bit unique ID can be used for DRM compliance

128-bit random ID

I Available in 74 and 90 MHz clock speeds

I LCD controller

— Interfaces directly to a single-scan panel

monochrome STN LCD

— Interfacestoasingle-scan panel color STN LCD

with minimal external glue logic

I Full JTAG boundary scan and Embedded ICE®

support

I Integrated Peripheral Interfaces

— 32-bit SDRAM Interface up to 2 external banks

— 8/32/16-bit SRAM/FLASH/ROM Interface

— Digital Audio Interface providing glueless

interface to low-power DACs, ADCs and CODECs

— Two Synchronous Serial Interfaces (SSI1, SSI2)

—CODEC Sound Interface

—8

×8 Keypad Scanner

— 27 General Purpose Input/Output pins

— Dedicated LED flasher pin from the RTC

I Internal Peripherals

— Two 16550 compatible UARTs

—IrDA Interface

—Two PWM Interfaces

—Real-time Clock

— Two general purpose 16-bit timers

— Interrupt Controller

— Boot ROM

I Package

—208-Pin LQFP

— 256-Ball PBGA

— 204-Ball TFBGA

I The fully static EP7312 is optimized for low power

dissipation and is fabricated on a 0.25 micron CMOS

process

OVERVIEW (cont.)

The EP7312 is designed for ultra-low-power operation.

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

operation range of 2.5 V–3.3 V. The device has three basic

power states: operating, idle and standby.

MaverickKey unique hardware programmed IDs are a

solution to the growing concern over secure web content

and commerce. With Internet security playing an

important role in the delivery of digital media such as

books or music, traditional software methods are quickly

becoming unreliable. The MaverickKey unique IDs

provide OEMs with a method of utilizing specific

hardware IDssuch asthose assigned forSDMI (Secure

Digital Music Initiative) or any other authentication

mechanism.

The EP7312 integrates an interface to enable a direct

connection to many low cost, low power, high quality

audio converters. In particular, high quality ADCs,

DACs, or CODECs such as the Cirrus Logic CS53L32A,

CS43L42, and CS42L50 are easily added to an EP73xx

design via the DAI. Some of these devices feature digital

bass and treble boost, digital volume control and

compressor-limiter functions.

Simply by adding desired memory and peripherals to the

highly integrated EP7312 completes a low-power system

solution. All necessary interface logic is integrated on-

chip.

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