Cirrus Logic EP7309 - Manual


Copyright Cirrus Logic, Inc. 2011
(All Rights Reserved) MAR ‘11
DS507F2
http://www.cirrus.com
High-performance,
Low-power, System-on-chip
with Enhanced
Digital Audio Interface
EP7309 Data Sheet
OVERVIEW
BLOCK DIAGRAM
FEATURES
(cont.) (cont.)
ARM720T Processor
— ARM7TDMI CPU
— 8 KB of four-way set-associative cache
— MMU with 64-entry TLB
— Thumb code support enabled
Ultra low power
— 90 mW at 74 MHz typical
— 30 mW at 18 MHz typical
— 10 mW in the Idle State
— <1 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, ADPCM, Audible,
etc.)
LCD
Controller
Boot
ROM
MaverickKey TM
ARM720T
ARM7TDMI CPU Core
MMU
8 KB
Cache
Write
Buffer
Internal Data Bus
EPB Bus
SRAM &
FLASH I/F
On-chip SRAM
48 KB
ICE-JTAG
Clocks &
Timers
Keypad&
Touch
Screen I/F
Interrupts,
PWM & GPIO
Bus
Bridge
(2) UARTs
w/ IrDA
Power
Management
Serial
Interface
Digital
Audio
Interface
The Maverick™ EP7309 is designed for ultra-low-power
applications such as digital music players, internet appliances,
smart cellular phones or any hand-held device that features the
added capability of digital audio decompression. The core-
logic functionality of the device is built around an ARM720T
processor with 8 KB 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
®
.
MEMORY AND STORAGE
U
SER INTERF
AC
E SE
RIAL POR
T
S