Cirrus Logic EP7312Ultra-low-power embedded applications

Cirrus Logic EP7312

	v. 3.1
Architecture:	ARM
Processor group:	ARM720T
Markets:	wireless, Internet appliances, industrial
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Please consult the board-support guide or contact us for specific platform features supported.

The Cirrus Logic® EP7312 is designed for ultra-low-power applications such as portable handheld 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 90 MHz and 74 MHz 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 BlueCat® embedded Linux®.

The EP7312 is designed for ultra-low-power operation. Its core operates at only 2.5 V, while its input/output has an operational range of 2.5 V to 3.3 V. The device has three basic power states: operating, idle, and standby.

The EP7312 integrates a digital audio interface to enable a direct connection to many low-cost, high-quality, audio converters from Cirrus Logic.

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.

• ARM7TDMI processor and MMU supporting Thumb mode:
  • 8 KB of four-way, set-associative cache
• Supports MP3, WMA, AAC, ADPCM, Audible, etc.
• 48 KB of on-chip SRAM
• 32-bit unique MaverickKey ID for digital rights management or design IP security
• Dynamic clock speeds of 90 MHz and 74 MHz
• LCD controller, interrupt controller, and boot ROM
• IrDA, PWM (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 and dedicated LED flasher (via real-time clock)
  • 27 general-purpose I/O pins
• Ultra-low power
  • 90 mW at 74 MHz
  • 108 mW at 90 MHz (typical)
  • <0.03 mW in the standby state
• Package: 208-pin LQFP, 256-ball PBGA, 204-ball TFBGA: available in commercial and industrial temperatures

Visit Cirrus Logic for more information and documentation on the EP7312.