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Home : Cirrus Products : Embedded Processors : EP7312 |
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High-Performance, Low-Power, System-on-Chip with SDRAM & Digital Audio
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The EP7312 is designed for ultra-low power applications such as portable hand-held devices that require digital audio decompression capability, Internet appliances, and low power industrial controls. The core-logic functionality of the device is built around an ARM720T processor running at clock speeds up to 74 and 90MHz 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 2.5V, while its I/O has an operational range of 2.5 to 3.3V. The device has three basic power states: operating, idle, and standby. The EP7312 integrates an interface to enable a direct connection to many low-cost, low-power, high-quality, audio converters. In particular, the DAI can directly interface with the CS43L41/42/43 low-power audio D/A converters and the CS53L32 low-power A/D converter. Simply by adding the desired memory and peripherals to the highly integrated EP7312 completes a low-power system solution. All necessary interface logic is integrated on-chip.
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Product Features
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- ARM7TDMI processor & MMU supporting Thumb mode
- 8 Kb of four-way, set-associative cache + 48 Kb SRAM
- Supports MP3, WMA, AAC, ADPCM, Audible, etc.
- 32-bit unique MaverickKey™ ID for SDMI compliance
- Dynamic clock speeds of 74 and 90 MHz
- LCD controller, interrupt controller and boot ROM
- IrDA, PWW (2), and 16550 UART (2) interfaces
- Real-time clock and two general purpose 16-bit timers
- Integrated peripheral interfaces
- 32-bit SDRAM interface up to 2 external banks
- 8/32/16-bit SRAM/FLASH/ROM
- Glueless digital audio plus CODEC interface
- Two synchronous serial interfaces (SSI1, SSI2)
- 8x8 keypad scanner & dedicated LED flasher (via RTC)
- 27 general-purpose input/output pins
- 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
- Package: 208-pin LQFP, 256-ball PBGA, or 204-ball TFBGA
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