EP7312 Datasheet, PDF (2/64 Pages) Cirrus Logic – HIGH-PERFORMANCE, LOW-POWER SYSTEM ON CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE

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
— Interfaces to a single-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 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.
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©Copyright Cirrus Logic, Inc. 2003
(All Rights Reserved)
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