UPD9993 Overview
The µ PD9993 is a PCM sound generator and MP3/AAC decoder LSI that includes an on-chip wide real-time surround function for mobile phones.
UPD9993 Key Features
- PCM sound generation method provides realistic sound reproduction
- Built-in digital signal processor for MP3/AAC decoder
- Built-in real-time wide surround function
- Supports ADPCM playback. Simultaneous playback with MIDI is also enabled
- Includes a high-performance D/A converter with 16-bit resolution
- Supports five sampling frequency modes: 8 kHz, 16 kHz, 32 kHz, 44.1 kHz, and 48 kHz (ASI and MP3/AAC
- Provides audio serial I/O interface (16 bits). The serial data input frequency is variable between 32 fs and 64 fs
- Includes function for mixing MIDI/ADPCM/MP3/AAC signals and audio serial input signals (only fs = 32 kHz
- Supports 8-bit parallel interface. The host CPU is connected via an 8-bit parallel interface when PS = 0
- Supports SPI. The host CPU is connected via a 3-wire or a 4-wire serial peripheral interface (SPI) when PS = 1