ATSAM3103 datasheet(6/24 Pages) ATMEL

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ATSAM3103

6093A–DRMSD–25-Oct-04

DSP Capacity and I/O Configuration

DSP Considerations

The ATSAM3103 includes three P24 DSPs.

Table 1 lists the performance levels achievable by the P24.

The ATSAM3103 runs firmware from built-in 16 x 24 RAM. The firmware should be

downloaded at power-up. This can be done from the following:

•

A small 256-kbit external EEPROM with SPI interface such as the Atmel AT25256

•

A DataFlash (current capacities range from 1 Mbit to 64 Mbits) if audio storage

functions are required

•

A SmartMedia card (supported capacities from 8 Mbytes to 128 Mbytes)

•

Parallel MPU type interface

I/O Selection

Considerations

I/Os are organized in groups that can be mutually exclusive because they share the

same IC pins (please refer to the pinout to identify the exclusions). The two main types

of operation are host controlled and stand-alone.

Host-controlled Operation

There are three main possible ways of communication with a host processor:

•

8-bit parallel MPU type bi-directional interface signals: D7 - D0, CS, WR, RD, A0,

IRQ

•

Asynchronous serial, MIDI_IN and, optionally, MIDI_OUT

•

Synchronous serial signals: SDIN, SCLK, SYNC, INT

The MPU type interface allows downloading firmware to the chip from the host. If

another interface is used, then external EEPROM or DataFlash is required.

Stand-alone Operation

Possible stand-alone modes are:

•

Firmware into external ROM or DataFlash

•

Firmware into external SmartMedia. In this case, the firmware should reside in the

SmartMedia reserved sectors starting at sector #1.

Table 1. P24 Performance Levels

Function

P24s Required

MP3 decode

Stereo reverb and chorus @48 kHz

31-band equalizer @96 kHz

Stereo 31-band equalizer @48 kHz

256 points FFT or IFFT @96 kHz incl. windowing

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