ML2871/73 PRODUCT INTRODUCTION SHEET ( , 2004) 1 June 23

HIGH-GRADE PCM SOUND GENERATOR LSIs TAILORED TO CHINESE INSTRUMENTS Description

ML2871 and ML2873 are a highly sophisticated PCM sound generator LSIs primarily, but not exclusively, designed for cell phones and PDAs. They also capable of replaying ADPCM and compressed speech and sound data. With an on-chip high-quality General MIDI sound set, the ML2871 plays 40 tones (32 polyphonies and 8 PCM) simultaneously with 16 timbres, while the ML2873 plays 16 polyphonies. The LSIs replay standard MIDI files, SMF, which is optimal for online services. Using the on-chip three FIFOs which store musical score data, MIDI messages and ADPCM audio data, a fantastic music ringer subsystem can readily be built around this chip. Both LSIs are particularly useful for the Chinese market since they contain data of traditional Chinese instruments, such as “Er Fu”, “Di Zi” and “Yang Qin”. Internal speaker amplifiers help reduce space and ease design. Also provided are ports to drive a ringing vibrator and PWM-driven LED outputs. CPU control is possible either in parallel or serial, while a comprehensive register structure allows easy programming. The chip contains an orchestra of musical instruments, a symphony on silicon, for modern cell phones and more. Block Schematic

D7-0 P5(VIB) GPIO WR 1.8V PWM FIFO RD CPU I/F Sequencer P0(PWMA) SEQ CS 8-bit Bus IFSEL Interface Wavetable-ROM ILE or Serial DVDD FIFO Sound DGND IRQ MIDI Generator + VREFL VDDIO AOUT SPOUT- FIFO Analog RESET Audio SPOUT+ ADPCM/ Block Synthesizer SPVDD PCM SPGND Clock Gen ADPCM/PCM 2.7~34MHz Audio MIXIN MIXOUT

Essential Features Simplified Application Example

• On-chip General MIDI +2 .7 ~3 .3V • Serial or 8-bit parallel CPU interface • Polyphonies ML2871: 32 (possible 40 tones by additional 8 PCMs) DVDD P0 LED ML2873: 16 D7~D0 D7~D0 P5 VIBRATOR • Internal 2-bit/4-bit ADPCM2 Synthesizer (fs 4 to 32kHz) CS CS HOST AOUT EXT IN • Embedded FIFOs: WR WR MCU MIXIN - For sequencer: 1024bit RD RD MIXOUT - For MIDI messages: 128bit RESET RESET PORT ILE - For ADPCM/PCM playback: 4096bit

• Melody playback synchronous with ADPCM VDD SPOUT • Internal speaker amplifier (8-ohms) SPOUT- • Transpose / Tone change / Volume functions IFSEL VREF • GPIO for synchronizing LED and ringing vibrator CLOCK • Power supply: DVDD = +2.7 to 3.6V SPVDD ML2871 BATTERY • I/O voltage: +1.65V to DVDD 5V MAX ML2873 SPGND • Speaker voltage: DVDD ~ 5V • Operating temperature: -20~+85°C DGND • Packaging options: 36-pin W-CSP and 32-pin QFN • ML2871 and ML2873 are software compatible

ML2871/73 are a joint development of Computer Co., Ltd. and Co., Ltd. This is a product introduction, not the products’ data sheet. Specification are subject to change without notice. OKI Electric Industry Co., Ltd., Silicon Solutions Company, Marketing Communications, 10-3, Shibaura, 4-chome, Minato-ku, 108-8551, , Tel.: +81-3-5445-6027, Fax.: +81-3-5445-6058 Japan: www.okisemi.com/jp/english/, USA: www.okisemi.com/us/, Europe: www.okisemi.com/eu/, Taiwan: www.okisemi.com/tw/, Hong Kong: www.okisemi.com/hk/, Shanghai: www.okisemi.com/sh/, Singapore: www.okisemi.com/sg/ FEPL2871_73-02