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| W56932 Brief 32-NOTE POLYPHONIC RINGTONE CHIP GENERAL DESCRIPTION The W56932 is designed for the ringtone application of cell phones with 32-note MIDI plus ADPCM/PCM synthesis. This single chip consists of a CPU interface, FIFO buffering,a wavetable sound set, a MIDI sequencer, a wavetable/ADPCM synthesizer, DAC, and a power amplifier that can drive an 8-ohm speaker directly. The W56932 also has a built-in, 4-wire SPI and 2-wire I2C bus to communicate directly with other SPI- or I2C-enabled devices. With an on-chip, high-quality, GM-compliant sound set, the W56932 supports up to 128 instruments and 47 drums for playback of any MIDI song with up to 32 simultaneous notes. MIDI songs in various formats can be downloaded and played back by passing the song to the CPU interface in the W56932. The ADPCM/PCM synthesizer is designed to allow for customized SFX (sound effects), in addition to ordinary MIDI songs. The sound effects can be played along with the MIDI tunes for more fantastic sound experiences. Synchronization between MIDI, SFX, LED, and MTR is done using embedded events in the MIDI file, which W56932 decodes and processes accordingly. The LED and MTR output pins, each with 256-level output, can be used for brightness and speed control, respectively. In addition, API (Application Program Interface) source code is provided for the CPU to control the W56932 easily via the memory parallel interface, or I2C and SPI serial interface. 1. FEATURES * 4-wire SPI or 2-wire I C bus (standard-mode 2 and fast-mode) * General MIDI compliant sound set: 128 instruments + 47 drums * 32-note, 100%-wavetable MIDI synthesizer with ADPCM/PCM synthesis * High quality sound * Simultaneous playback of o o o MIDI, or MIDI + ADPCM, or Two ADPCM files, * On-chip power amplifier that can drive 8 speaker directly * Equalizer embedded to meet speaker response * Line-In to receive external analog signals * LED output with 256 levels of brightness * MTR output with 256 levels of speed * Harmonized synchronization between MIDI, SFX, LED, and MTR * Embedded PLL 1.7 to 36 MHz clock input * Power supply o VDD: 2.7 ~ 3.3 volts o SPVDD: 2.7 ~ 4.5 volts o IOVDD: 1.65 ~ VDD * Operating current: 20 mA (25C at no load) * Standby current: 1 uA @ 25C * Operating temperature: -20C ~ 85C * Package o 32-pin plastic QFN (5.2mmx6.2mmx1mm) * Karaoke feature supported * MIP support for SP-MIDI format * Middleware API source code provided for function control and CPU interface which include 8-bit parallel 2 memory bus, SPI and I C serial interface. * Multiple Format Parser that supports o o MIDI: SMF, SP-MIDI, i-Melody, RTTTL, etc. Audio: WAV @ 48 KHz * Mono DAC with 12-bit resolution -1- Publication Release Date: May 2005 Revision A0 W56932 PIN CONFIGURATION TYPICAL APPLICATION CIRCUIT Parall interface -2- Publication Release Date: May 2005 Revision A0 W56932 SPI I2C -3- Publication Release Date: May 2005 Revision A0 |
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