ADUCM350BBCZ datasheet(37/41 Pages) AD

37 / 41 page

ADuCM350

Data Sheet

Rev. A | Page 36 of 40

Type A and Type B, and 9-bit (Option 1) and 8-bit (Option 3)

serial interfaces for Type C.

By using the display controller, the depth on various interfaces

is as follows:

• 8-bit interface is 8, 12, or 16 bits per pixel (not 18 or 24).

• 9-bit interface is 18 bits per pixel (not 8, 12, 16, or 24).

• 16-bit interface is 8, 12, or 16 bits per pixel (not 18 or 24).

AUDIO OPTIONS

The ADuCM350 has an integrated audio driver for beeper and

an integrated I2S port.

Beeper

The beeper driver module in the ADuCM350 generates a

differential square wave of programmable frequency. It drives

an external piezoelectric sound component whose two

terminals connect to the differential square wave output.

The beeper driver consists of a module that can deliver

frequencies from 8 kHz to ~0.25 kHz. It operates on a fixed

independent 32 kHz (32,768 Hz) clock source that is unaffected

by changes in system clocks.

A timer allows for programmable tone durations from 4 ms to

1.02 sec in 4 ms increments. Single-tone (pulse) and multitone

(sequence) modes provide versatile playback options.

In sequence mode, the beeper can be programmed to play any

number of tone pairs from 1 to 254 (2 to 508 tones) or be

programmed to play forever (until stopped by the user).

Interrupts are available to indicate the start or end of any beep,

the end of a sequence, or that the sequence is nearing

completion.

I2S

The device supports I2S. The purpose of the I2S port is to

provide audio data to an amplifier, which drives a small

speaker. The I2S features available on the ADuCM350 include

the following:

• Data samples of up to 24 bits.

• Frame clocks from 8 kHz to 192 kHz.

• Master/slave mode.

• 8-deep Tx FIFOs.

• DMA mode with address autoincrement.

• Interrupt mode.

• Downsampling transfers.

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