EP7312_05 Datasheet, PDF (1/64 Pages) Cirrus Logic – High-performance, Low-power, System-on-chip with SDRAM & Enhanced with SDRAM & Enhanced

FEATURES
❑ ARM^®720T Processor
— ARM7TDMI CPU Operating at Speeds of 74 and
90 MHz
— 8 kBytes of Four-way Set-associative Cache
— MMU with 64-entry TLB
— Thumb™ Code Support Enabled
❑ Ultra low power
— 90 mW at 74 MHz Typical
— 108 mW at 90 MHz Typical
— <.03 mW in the Standby State
❑ Advanced Audio Decoder/decompression Capability
— Supports bit streams with adaptive bit rates.
— Allows for support of multiple audio decompression
algorithms (MP3, WMA, AAC, Audible, etc.).
EP7312 Data Sheet
High-performance,
Low-power, System-on-chip
with SDRAM & Enhanced
Digital Audio Interface
OVERVIEW
The Cirrus Logic^™ EP7312 is designed for ultra-low-power
portable and line-powered applications such as portable
consumer entertainment devices, home and car audio juke box
systems, and general purpose industrial control applications, or
any device that features the added capability of digital audio
compression & decompression. The core-logic functionality of
the device is built around an ARM720T processor with
8 kBytes of four-way set-associative unified cache and a write
buffer. Incorporated into the ARM720T is an enhanced
memory management unit (MMU) which allows for support of
sophisticated operating systems like Microsoft^® Windows^®
CE and Linux^®.
BLOCK DIAGRAM
(cont.)
(cont.)
Digital
Audio
Interface
S e ria l
Interface
Power
M anagem ent
(2) UARTs
w/ IrDA
Boot
ROM
Internal Data Bus
EPB Bus
ARM720T
IC E -J T A G
ARM7TDMI CPU Core
8 KB
Cache
W rite
B u ffer
MMU
Bus
B rid g e
M averickKey^TM
M em ory Controller
SRAM I/F
SDRAM I/F
On-chip SRAM
48 KB
Clocks &
Tim ers
Interrupts,
PW M & GPIO
Keypad&
Touch
Screen I/F
LCD
C o n tro ller
MEMORY and STORAGE
http://www.cirrus.com
©Copyright Cirrus Logic, Inc. 2005
(All Rights Reserved)
AUG ‘05
DS508F1