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EP7312-IB Datasheet - Cirrus-Logic

Part Name
Description
MFG CO.
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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®.

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.).
❑ 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.

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Part Name
Description
PDF
MFG CO.
HIGH-PERFORMANCE/ LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE
Cirrus Logic
Digital audio applications requiring digital audio compression and decompression, sound field processing, acoustic equalization, and other digital audio algorithms.
Motorola => Freescale
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Hitachi -> Renesas Electronics
256M LVTTL interface SDRAM 100 MHz 1-Mword × 64-bit × 4-bank/2-Mword × 32-bit × 4-bank PC/100 SDRAM
Hitachi -> Renesas Electronics
512M LVTTL interface SDRAM 133 MHz/100 MHz 8-Mword × 16-bit × 4-bank/16-Mword × 8-bit × 4-bank /32-Mword × 4-bit × 4-bank PC/133, PC/100 SDRAM
Elpida Memory, Inc
512M LVTTL interface SDRAM 133 MHz/100 MHz 8-Mword × 16-bit × 4-bank/16-Mword × 8-bit × 4-bank /32-Mword × 4-bit × 4-bank PC/133, PC/100 SDRAM
Elpida Memory, Inc
64M LVTTL Interface SDRAM 100 MHz 1-Mword x 16-bit x 4-bank/ 2-Mword x 8-bit x 4-bank/ 4-Mword x 4-bit x 4-bank PC/100 SDRAM
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64M LVTTL interface SDRAM 133 MHz/100 MHz 1-Mword × 16-bit × 4-bank/2-Mword × 8-bit × 4-bank /4-Mword × 4-bit × 4-bank PC/133, PC/100 SDRAM
Elpida Memory, Inc
256M LVTTL interface SDRAM 133 MHz/100 MHz 4-Mword × 16-bit × 4-bank/8-Mword × 8-bit × 4-bank/16-Mword × 4-bit × 4-bank PC/133, PC/100 SDRAM
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