00W099A Tone generator LSI for cellular phones BU8766FV Dimension （Units : mm） Description The BU8766FV is a tone generator IC for producing a triple chord that has both a RAM and sequencer to reduce the load of CPU soft. Cellular phones can give a musical performance by down-loading melody data from the C-MIDI format. This IC corresponds to three master clocks and has an adjustment function for a parameter needed to generate a chord. Waveform parameter can be selected from sine wave and special square wave. 1 8 4.4±0.2 9 0.65 0.22±0. 1 0.15±0. 1 1. 15±0.1 0. 1 6.4±0.3 5.0±0.2 16 0.3Min. 0. 1 Features 1) Triple chord can be generated by control from CPU. 2) CPU soft load can be decreased by incorporating RAM and sequencer. 3) RAM 1kByte as a buffer for download data. 4) Can adjust parameter needed to generate a chord. 5) DTMF generating function 6) Can select a wave parameter for generating sound. (sine wave/special square wave) 7) Control from CPU by serial data SSOP-B16 Applications Cellular phones with a function to register melody at receiving the call ●Absolute Maximum Ratings（Ta=25°C） Parameter Powersupplyvoltage Powerdissipation Symbol Limits Unit VDD −0.3∼ ＋4.5 V Pd Operatingtemperaturerange Topr Tstg Storagetemperaturerange ＊ 450 −40 ∼ ＋85 mW −50 ∼ ＋125 °C °C ＊Derating : 4.5mW／°C for operation above Ta=25°C ●Recommended Operating Conditions（Ta=25°C） Parameter Powersupplyvoltage Symbol Min. Typ. VDD 2.2 2.5 Max. 3.6 Unit V November, 2000 ●Electrical characteristics（Unlessotherwisenoted:Ta=25°C） Parameter Symbol Min. Typ. Max. Unit Conditions ＜DigitalDCcharacteristics＞ Highlevelinputvoltage VIH 0.7VDD − − V Lowlevelinputvoltage VIL − − 0.3VDD V Highlevelinputcurrent IIH − − 10 μA VIH=VDD Lowlevelinputcurrent IIL −10 − − μA VIH=GND VDD−0.3 − − V IOH=−0.8mA − − GND＋0.3 V IOL=0.8mA Highleveloutputvoltage VOH Lowleveloutputvoltage VOL ＜AnalogDCcharacteristics＞ VREFpinvoltage VAGND 0.475VDD 0.5VDD 0.525VDD V IOUT=0A（Noload） ANOUTpinvoltage VOUT 0.47VDD 0.5VDD 0.53VDD V IOUT=0A（Noload） ＜Wholecharacteristics（VDD=2.5V）＞ VREFpinrisetime − − 1 μA RESET=L Otherinputs=L IDD2 − 1500 2200 μA RESET=H MCLK=2.688MHz IDD3 − 1700 2500 μA Other IDD4 − 2500 3400 μA inputs=L MCLK=4.92MHz tRVR − 25 40 mS AtCVREF=1μF,RESET=L→H MCLK=3.25MHz Noload Circuitcurrent IDD1 ●Block Diagram SRAM TEST0 1 1k×8bits Test wd adr rd RAM I/F setting-data SI 2 SO 3 Serial I/F WAVE Gen. Timing Gen. TEST1 4 SCLK 5 VDD 6 WAVE Gen. Wave Reg. ＋ DAC IPF 9bits fc=20kHz 16 ANOUT setting-data VDD WAVE Gen. clksel 15 VREF cpuclk setting-data 14 GND GND MCLK 7 CLK Gen. compact MIDI sequencer 13 EN 12 PORT wavsel wavclk 11 INT 10 PAGE RESET 8 9 PINT BU8766FV