EP7312 datasheet(2/64 Pages) CIRRUS

2 / 64 page

©Copyright Cirrus Logic, Inc. 2005

DS508F1

EP7312

High-Performance, Low-Power System on Chip

FEATURES (cont)

❑ 48 KBytes of On-chip SRAM

❑ MaverickKey™ IDs

— 32-bit unique ID can be used for DRM-compliant 128-

bit random ID.

❑ Available in 74 and 90 MHz clock speeds.

❑ LCD controller

— Interfaces directly to a single-scan panel monochrome

STN LCD.

— Interfaces to a single-scan panel color STN LCD with

minimal external glue logic.

❑ Full JTAG Boundary Scan and Embedded ICE® Support

❑ Integrated Peripheral Interfaces

— 32-bit SDRAM Interface, Up to 2 External Banks

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

— Digital Audio Interface provides 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

❑ Internal Peripherals

— Two 16550-compatible UARTs

— IrDA Interface

— Two PWM Interfaces

— Real-time Clock

— Two General-purpose 16-bit Timers

— Interrupt Controller

— Boot ROM

❑ Package

—208-Pin LQFP

—256-Ball PBGA

—204-Ball TFBGA

❑ The fully static EP7312 is optimized for low power

dissipation and is fabricated using 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 IDs such as those assigned for

SDMI (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.

EP7312 Datasheet(PDF) 2 Page - Cirrus Logic

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