HD49235 Datasheet | Hitachi Semiconductor

Description The HD49235FS is a digital signal processor for pact disc (CD) applications. Features - Powerful error correction capability: two-symbol C1 correction and four-symbol C2 correction - Quadruple-speed reproduction supported (maintaining two-symbol C1 and four-symbol C2 error correction) - On-chip analog PLL and digital PLL (VCO and phase detector) - Automatic adjustment of the free-running frequency of the VCO - Built-in microprocessor interface - On-chip 80-bit shift registers for Q-code buffering - Cyclic redundancy check on Q-code values - Audio output functions: monaural output, single-channel mute, left-right reverse, soft mute, - 12-d B attenuation - 16-kbit RAM on-chip HD49235FS Pin Arrangement PDOUT1 VDD (A) AMPP AMPM AMPO AC VSS (A) PDOUT2 TEST1 MRST PLLCK NC VDD (D) NC NC NC NC NC NC NC NC NC NC NC QDSEL DSLCO DSLCI EFMI DEFCT TEST2 TEST3 UCKSL VDD (D) PWM MON MSTOP PW64 ROTD CLVS SLOCK 64 65 41 40 80 1 25 24 NC NC NC NC NC NC NC NC NC VSS (D) XCI XCO NC MCK TC1 UCK Rev.2, Aug. 1995, page 2 of 41 XRST CNIN SENS DATA CLK XLT VSS (D) OVFW S1 QOK QDATA CKEXT SUBOUT SUBCK CFCKP EMP BIDAT MUTE DAS CKX MPX C2F QMX DMX (Top view) HD49235FS Pin Description Pin No. Symbol 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 XRST CNIN SENS DATA CLK XLT VSS (D) OVFW S1 QOK QDATA CKEXT Name X (µ-) reset Counter clock input Sensor Data Clock I/O- I I TO I I Connection Function Polarity H L Reset Microprocessor Microprocessor interface register reset Servo IC Pulse input for track counter Microprocessor Servo status output Microprocessor Data input for microprocessor interface Microprocessor Clock input for microprocessor interface Microprocessor Strobe input for microprocessor interface Digital ground On-chip RAM overflow signal output Microprocessor Subcode sync signal (with protection) Microprocessor Subcode CRC result output Microprocessor Subcode Q data output Microprocessor Clock input for Q data readout CD graphics CD graphics CD graphics Subcode data...