EP7312-IV-C 반도체 회로 부품 판매점
HIGH-PERFORMANCE/ LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE
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 ETC |
www.DataSheet4U.com
EP7312 Data Sheet
FEATURES
I 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
I Ultra low power
— 90 mW at 74 MHz typical
— 108 mW at 90 MHz typical
— <.03 mW in the Standby State
I 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.)
High-Performance,
Low-Power System on Chip with
SDRAM and 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.)
D ig ita l
A u d io
In terfa ce
S erial
In terfa ce
Power
M an ag em 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 ffe r
MMU
Bus
Bridge
M averickKeyTM
M em ory Controller
SRAM I/F
SDRAM I/F
On-chip SRAM
48 KB
Clocks &
Tim ers
In terru p ts ,
P W M & G P IO
Keypad&
Touch
S creen I/F
LCD
C o n tro lle r
http://www.cirrus.com
MEMORY and STORAGE
©Copyright Cirrus Logic, Inc. 2003
(All Rights Reserved)
Nov ’03
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
— 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.
©2 Copyright Cirrus Logic, Inc. 2003
(All Rights Reserved)
DS508PP5
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EP7312-IV-C
HIGH-PERFORMANCE/ LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE - ETC
