Features: ` Audio decoder system-on-chip
- Allows for support of multiple audio decompression algorithms
- Supports MPEG 1, 2, & 2.5 layer 3 audio decoding, including ISO compliant MPEG 1 & 2 layer 3 support for all standard sample rates and bit rates
- Supports bit streams with adaptive bit rates
- DAI (Digital Audio Interface) providing glueless interface to low power DACs, ADCs, and Codecs
` Ultra low power consumption for MP3 playback
- 87 mW (typical) for 44.1 kHz samples/sec, 128 kbits/second
- 50 mW for 22.05 kHz samples/sec, 64 kbits/second
- <1 mW in Standby State
` ARM720T processor
- ARM7TDMI CPU
- 8 kbytes of four-way set-associative cache
- MMU with 64-entry TLB (transition look-aside buffer)
- Write Buffer
- Windowsâ CE enabled
- Thumb code support enabled
` Dynamically programmable clock speeds of 18, 36, 49, and 74 MHz at 2.5 V
` Performance matching 100 MHz Intelâ Pentium-based PC
` OEM customization
- Integrated ARM720T RISC processor
- Up to 25 MHz of CPU processing power available (after digital audio decoding) for custom features such as software EQ or tone control, volume control, spectrum analyzer, random play order, etc.
- Allows for control of digital voice recorder function
` LCD controller
- Interfaces directly to a single-scan panel monochrome LCD
- Panel width is programmable from 32 to 1024 pixels in 16-pixel increments
- Video frame buffer size programmable up to 128 kbytes
- Bits per pixel of 1, 2, or 4 bits
` Memory controller
- Decodes up to 6 separate memory segments of up to 256 Mbytes each
- Each segment can be configured as 8, 16, or 32 bits wide and supports page-mode access
- Programmable access time for conventional ROM/SRAM/FLASH memory
- Supports Removable FLASH card interface
- Enables connection to removable FLASH card for addition of expansion FLASH memory modules
` 38,400 bytes (0x9600) of on-chip SRAM for fast program execution and/or as a frame buffer
` On-chip boot ROM for manufacturing support
` Integrated DAI interface
- Connects directly to a Crystal® audio DAC
` 27-bits of general-purpose I/O
- Three 8-bit and one 3-bit GPIO port
- Supports scanning keyboard matrix
` SIR (up to 115.2 kbps) infrared encoder/decoder
- IrDA (Infrared Data Association) SIR protocol encoder/decoder
` DC-to-DC converter interface (PWM)
- Provides two 96 kHz clock outputs with programmable duty ratio (from 1-in-16 to 15-in-16) that can be used to drive a DC to DC converter
` 208-pin LQFP or 256-ball PBGA packages
` Full JTAG boundary scan and Embedded ICE supportPinout
Specifications
| DC Core, PLL, and RTC Supply Voltage |
2.9 V |
| DC I/O Supply Voltage (Pad Ring) |
3.6 V |
| DC Pad Input Current |
±10 mA/pin; ±100 mA cumulative |
| Storage Temperature, No Power |
40°C to +125°C |
DescriptionThe EP7209 is a complete integrated system on a chip for enabling personal digital audio solutions. It is designed specifically for implementing audio processing algorithms in power sensitive applications. The core-logic functionality of the device is built around an ARM720T embedded processor.
The EP7209 also includes a 32-bit Y2K-compliant Real-Time Clock (RTC) and comparator.
The EP7209 also includes a comprehensive set of integrated peripherals such as an LCD display controller, an audio DAC interface, and a FLASH memory interface. Using the EP7209, a portable audio decoder solution can be built with the addition of an LCD display, an audio DAC, a FLASH memory subsystem, and a small number of additional low cost components.
The EP7209 uses its powerful 32-bit RISC processing engine to implement audio decompression algorithms in software. The nature of the on-board RISC processor and the availability of efficient C-compilers and other software development tools ensures that a wide range of audio decompression algorithms can easily be ported to and run on the EP7209.
The EP7209 uses external memory for storing application code. The use of external memory to support software audio decompression algorithms ensures that the audio decompression system solution can be tailored to the requirements of the application. Software can be placed in a low cost mask ROM for price sensitive applications, or can be placed in external FLASH memory to enable upgradeable systems. The EP7209's 8 kbyte on-board cache and programmable wait state generator ensure that a wide range of memory options can be utilized.
The EP7209 runs a full ISO-compliant MPEG 1, 2, & 2.5 layer 3 audio decompression engine with less than 50% of its available processing capability. This leaves significant processing power available for product differentiation.
EP7209 Data Sheet
