Sharp GX20 Service Manual - Page 136

GX20 IC103 VHIYMU759B+1FL (YMU759B): SOUND Pin No. 1 2 3 4 5 6 7 8 9 10 11* 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Terminal name CLKI EXT1 /IRQ /RST IFSEL PLLC VDD VSS VREF HPOUT-L/MONO HPOUT-R EQ1 EQ2 EQ3 SPVDD SPVSS SPOUT1 SPOUT2 EXT2 D7 D6 D5 D4 D3 D2 D1 D0 /WR SDIN (/CS) Input/Output Input Output Output Input Input - - - - Output Output - - - - - Output Output Output Input/Output Input/Output Input/Output Input/Output Input/Output Input/Output Input/Output Input/Output Input Input 30 SYNC (A0) Input 31 SCLK (/RD) Input 32* SDOUT Output CONFIDENTIAL Description of terminal Clock input terminal (2 - 20 MHz) External control terminal 1 Interrupt output terminal Hardware reset input terminal CPU I/F select; L: serial I/F, H: parallel I/F Built-in PLL capacitor terminal Power supply Ground Analog reference voltage terminal Headphone output Lch Headphone output Rch Equalizer terminal 1 Equalizer terminal 2 Equalizer terminal 3 Analog power supply for speaker amplifier (Typ + 3.6 V) Analog ground for speaker amplifier Speaker terminal 1 Speaker terminal 2 External control terminal 2 Parallel I/F data bus 7 Parallel I/F data bus 6 Parallel I/F data bus 5 Parallel I/F data bus 4 (Not connected when IFSEL terminal at L) Parallel I/F data bus 3 (Not connected when IFSEL terminal at L) Parallel I/F data bus 2 (Not connected when IFSEL terminal at L) Parallel I/F data bus 1 (Not connected when IFSEL terminal at L) Parallel I/F data bus 0 (Not connected when IFSEL terminal at L) Parallel I/F write pulse (Not connected when IFSEL terminal at L) IFSEL terminal = L serial I/F data input IFSEL terminal = H parallel I/F chip select input IFSEL terminal = L serial I/F data read signal FSEL terminal = H parallel I/F address signal IFSEL terminal = L serial I/F bit clock input IFSEL terminal = H parallel I/F read pulse Serial I/F data output (external pull-up resistor required) In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside. HPOUT-L/ MONO HPOUT-R CLKI PLLC VSS VDD /RST 4 SCLK 31 SYNC 30 SDIN 29 SDOUT 32 /CS 29 A0 30 /WR 28 /RD 31 20 ~ 27 D0~D7 IFSEL 5 /IRQ 3 EXT1 2 EXT2 19 SELECT 78 6 1 PLL Timing Generator Power Down Control Register CPU I/F FM FIFO x1 FM Synthesizer Vol Number of voices: 16 (Fs = 49.7 kHz) Vol Sequencer Sequencer ADPCM Seq FIFO ADPCM Waveform FIFO ADPCM Vol Playback & (Fs = 4 or 8 kHz) LPF Mix & Select LED control TIMER Vibrator control 11 10 HP Vol R HP Vol L Rch Lch 16-bit DAC Select Mono EQ 12 EQ1 Vol VREF +- 13 EQ2 14 EQ3 SP Vol 17 SPOUT1 18 SPOUT2 VREF 9 16 15 SPVDD SPVSS VREF 6 - 4