UPD9993 datasheet(21/102 Pages) RENESAS

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µ PD9993

Data Sheet S17306EJ2V0DS

(5) Digital signal processor block for decoding MP3/AAC

The

µPD9993 has a high-performance digital signal processor for decoding MP3/AAC. For decoding, firmware

needs to be downloaded from external memory.

Only the MP3/AAC decoder or PCM sound generator (MIDI/ADPCM) can be selected. Therefore both cannot

operate at the same time. Selection of the MP3/AAC decoder and PCM sound generator is performed by

setting command register.

(6) Audio serial I/O interface

This is an I/O interface for external audio data.

Five sampling frequency modes are supported: 8 kHz, 16 kHz, 32 kHz, 44.1 kHz, and 48 kHz (Initial value is

32 kHz).

The serial data input frequency is variable.

(7) Selector/mixer

This block is used to switch among or mix the sound generator (or the MP3/AAC decoder) and audio serial

input.

(8) AST (surround)

This block performs real-time surround processing.

(9) DAC

This block converts digital signals to analog signals.

This DAC (D/A converter) is a high-performance stereo DAC with 16-bit resolution.

(10) General-purpose output ports (PO0-PO3)

The PO0-PO3 ports can be directly controlled by the host CPU. It is also possible to use these ports as

additional LED ports.

(11) Soft Volume & Mute

A Digital Soft Volume & Mute function is built in. It is possible to change the digital volume gradually.

UPD9993 bảng dữ liệu(PDF) 21 Page - Renesas Technology Corp