Digital Sound Processors for FPD TVs 32bit Audio DSP No.12083EAT04 BU9414FV General Description This LSI is the digital sound processor which made the use digital signal processing for FPD TVs. DSP of ROHM original is used for the TV sound processor unit, and it excels in cost performance. There are two digital input systems. An output is a digital output corresponding to 2.1ch. Features Digital Signal Processor unit Word length: 32bit (Data RAM) The fastest machine cycle: 40.7ns (512fs, fs = 48kHz) Multiplier: 32 x 24 56bit Adder: 32 + 32 32bit Data RAM: 256 x 32bit Coefficient RAM: 128 x 24bit Sampling frequency: fs = 48kHz Master clock : 512fs (It is a slave to 256fs of fs = 48kHz, 44.1 kHz, and 32 kHz) Digital signal input (Stereo 2 lines): 16/20/24bit(I2S, Left-Justified, Right-Justified) Digital signal output (Stereo 2 lines): 16/20/24bit(I2S, Left-Justified, Right-Justified, S/PDIF) The sound signal processing function for FPD TVs 2 Pre-Scaler, DC cut HPF, Channel Mixer, P Volume(Perfect Pure Volume), BASS, MIDDLE, 2 2 TREBLE, Pseudo BASS, Surround, P Bass, P Treble, 7Band Parametric EQ, Master Volume, L/R balance, Post-Scaler, Output signal clipper 2 2 2 (P Volume, P Bass, and P Treble are the sound effect functions of ROHM original.) Applications Flat Panel TVs (LCD, Plasma) www.rohm.com 2012.03 - Rev.A 1/57 2012 ROHM Co., Ltd. All rights reserved. Technical Note BU9414FV Absolute maximum ratingTa=25C Item Symbol Rating Unit Power-supply voltage V 4.5 V DD Allowable dissipation P 700 (*1) mW d operating temperature range T -25+85 C opr Storage temperature range T -55+125 C stg *1 7mW is decreased for 1C when using it with Ta=25C or more. *Operation cant be guaranteed. Operating conditionTa=-25+85C Item Symbol Rating Unit Power-supply voltage V 3.03.6 V DD * It isnt Radiation-proof designed for the product. www.rohm.com 2012.03 - Rev.A 2/57 2012 ROHM Co., Ltd. All rights reserved.