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BU9253AS Datasheet(PDF) 9 Page - Rohm |
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BU9253AS Datasheet(HTML) 9 Page - Rohm |
9 / 17 page 9/16 ●Description of operations < BU9253AS/FS> ・ OSC(Oscillator) Clock is generated by connecting external RC circuit. Clock is used for the delay counter. ・ Mute control circuit (MUTE) By input voltage of the mute terminal, 3 statuses, that is, mute, mute release (operating), and clock stop & mute can be selected. ・ COUNTER This counter is for generating delay time. It can generate delay time about 131ms at oscillation frequency Fclk = 375kHz. ・ SRAM SRAM with 8Kbit capacity for generating the delay. ・ A/D side LPF operation amplifier LPF can be structured by external RC, and band limit of signal to be input to A/D is available. ・ A/D This digitalizes output signal of AD side LPF, and outputs it to SRAM. ・ D/A side LPF operation amplifier LPF can be structured by external RC, and band limit of signal to be output to D/A is available. ・ D/A This converts delayed audio digital data input from SRAM into analog signal. ・ Mixing amplifier (MIX) This circuit is used for mixing delayed signals and (original sound) signals input from MIX IN. < BU9262AFS> ・ Serial control circuit This serial I/F circuit is for setting each register. It can be controlled by serial 16bit data. It reads in SI at the rise of SCK, and latches data at the rise of SLT. No. Mode Remarks D0 D1 D2 Delay time Delay time setting "Refer to the separate table." D3 D4 INPUT select “ ISEL” ( D3、D4 ) = ( L、L ):L+R ( L、L ):L-R ( L、H ):MIC ( H、H ):CLK OFF D5 D6 OUTPUT select “ OSEL” ( D5、D6 ) = ( L、L ):FWD (L, R in phase) ( L、L ):REV (R in opposite phase) ( L、H ):MIC MIX ( H、H ):NORMAL D7 Delay out “DOSW” H : output ON L : output OFF D8 D9 D10 Delay volume “ DLYVOL” Delay signal / volume setting "Refer to the separate table." D11 D12 D13 Feedback volume “ FBVOL” Feedback / volume setting "Refer to the separate table." D14 Latch control (D5, D6) = (L, H) : latch Others are not latch |
Similar Part No. - BU9253AS_05 |
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Similar Description - BU9253AS_05 |
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