4

6237A–DRMSD–29-May-06

ATSAM3703

3.6

Router: Final ACC, MIX, Audio Out, Audio In

This block includes a RAM, accessed through the Async Bus, which defines the routing from the

Sync Bus to/from the Audio I/O or back to the Sync Bus (mix send). It takes care of mix and

accumulation from Sync Bus samples. 8 channels of audio in and 8 channels of audio out are

provided (4 stereo in/out, I2S format). The stereo audio in channels may have a different sam-

pling rate than the audio out channels. In this case, one or more P24s take care of sampling rate

conversion.

3.7

I/O

The ATSAM3703 includes very versatile I/Os that share common pins for reduced pin count and

small IC footprint. Most I/Os, when not used for a specific function, remain available as firmware

controlled general-purpose pins.

The following peripherals are included on chip:

• 2 x 8-bit timers

•2 x 16-bit timers

• Parallel slave 8-bit port, MPU401 compatible

• Parallel master 8-bit port, for connection to SmartMedia and/or LCD display, switches, etc.

• 2 x asynchronous bi-directional serial port (one used as debug interface)

• Synchronous serial slave port (SPI type host connection)

• Firmware controlled I/O pins