Casio QT 6000 Service Manual - Page 76
ADPCM SPEECH LSI IC15: MSM9841, 13-1. Pin Assignment, 13-2. Block Diagram, DREQL, DACKL, TEST1
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Page 76 highlights
8-13. ADPCM SPEECH LSI (IC15: MSM9841) 8-13-1. Pin Assignment D0 1 D1 2 D2 3 D3 4 NC 5 D4 6 D5 7 D6 8 D7 9 NC 10 D8 11 D9 12 D10 13 D11 14 56 NC 55 XT 54 XT 53 IOR 52 IOW 51 DREQL 50 DACKL 49 DGND 48 TEST1 47 TEST0 46 VCK 45 ADSD 44 DASD 43 SIOCK 42 BUSY 41 D/C 40 CS 39 RD 38 WR 37 FUL/DREQR 36 MID 35 EMP 34 CH/DACKR 33 RESET 32 NC 31 DVDD 30 AVDD 29 AOUTR NC 15 D12 16 D13 17 D14 18 D15 19 NC 20 DGND 21 AGND 22 MIN 23 MOUT 24 LIN 25 LOUT 26 SG 27 AOUTL 28 8-13-2. Block Diagram MOUT LOUT AOUTL AOUTR External DAC/ ADC I/F MIN LIN EMP MID FUL/DREQR CH/DACKR D15 to D0 WR RD CS D/C BUSY input side LPF ADC output side LPF DAC DAC output side LPF FIFO MCU I/F Volume Controller ADPCM2/ADPCM/PCM Analyzer ADPCM2/ADPCM/PCM/Non-linear PCM Synthesizer DMA I/F Timing Controller DREQL DACKL IOW IOR VCK XT XT RESET - 74 - SG AVDD AGND DVDD DGND ADSD DASD SIOCK TEST0 TEST1
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