EP7312

` 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
- 90mWat 74MHz typical
- 108 mW at 90 MHz typical
- <.03mWin 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 compliance 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 STNLCD 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 providing glueless interface to low-power DACs, ADCs and CODECs
- Two Synchronous Serial Interfaces (SSI1, SSI2)
- CODECSoundInterface
- 8*8 Keypad Scanner
- 27 General Purpose Input/Output pins
- Dedicated LED flasher pin from the RTC
` Internal Peripherals
- Two 16550 compatible UARTs
- IrDAInterface
- TwoPWMInterfaces
- Real-timeClock
- 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 on a 0.25 micron CMOS process

The Cirrus Logic™ EP7312 is designed for ultra-lowpower 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®.

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 V3.3 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 onchip.