High-Performance, Low-Power System-on-Chip Enhanced Digital Audio Interface

The EP7309 is designed for ultra-low-power applications such as digital music players, Internet appliances, smart cellular phones or any handheld 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®.

The EP7309 is designed for ultra-low-power operation. Its core operates at only 2.5 V, while its input/output has an operation range of 2.5 V to 3.3 V. The device has three basic power states: operating, idle and standby.

The EP7309 integrates an interface to enable a direct connection to many low-cost, high-quality audio converters from Cirrus Logic.

Adding only desired memory and peripherals to the highly integrated EP7309 completes a low-power system solution. All necessary interface logic is integrated on-chip.

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  • 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 (special order feature)
  • Dynamic clock speeds of 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
    • 8/32/16-bit SRAM/Flash/ROM interface
    • 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 typical
    • <0.03 mW in the standby state
  • Package: 208-pin LQFP, 256-ball PBGA, 204-ball TFBGA
    • Available in commercial and industrial temperatures
    • Available in lead-free

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