DESCRIPTION
TDA7522 is a single chip processor consisting of Decoder, Servo and 1bit D/A for 4times CD-ROM / CDAudio. Main concept of this IC is that it is based on embedded System Micro Controller which allows customer to develop system software very easily: just based on provided commands. Further the microcontroller is fully customer dedicated in terms of both software and general purpose Port.

■ BUILT IN 8Bit MICROCONTROLLER (STANDARD ST7) with:
    – 24 KByte ROM available for ST7 & Servo-Audio DSP
    – 1024Byte RAM, including 128byte stack
    – 4KByte RAM for CD-Text memory (for 1block)
    – Built in R-W subcode buffer (Max. 144Byte 8packs) for CD-Text
    – 24 bit general I/O port (PoartA[7-0], PortB[7-0], PortC[7-0])
    – One External Interrupt (16 IRQ encoder inside)
    – 16bit free running counter timer
    – 8bit 1ch general purpose A/D
    – I2C bus I/F
    – Watch dog
    – Kenwood I/F
■ STAND-BY MODE (Stop all clocks and Shut down power of Peripheral (PON pin))
■ BUILT IN SERVO & AUDIO DIGITAL SIGNAL PROCESSOr (SAC-DSP) inclusive of:
    – 1024x19bit Program RAM
    – 512x16bit Coefficient RAM
    – 1024x20bit Data RAM
    – 128x6bit Decimation RAM
    – MAC: 16 bit (Coefficients) x 20 bit (data) multiplier with 38 bit adder
    – Instruction execution rate as high as 56MIPS
■ BUILT IN PROGRAMMABLE CLOCK GENERATOR PLL
■ PERIPHERALS for CD PLAYER APPLICATION
    – Data Acquisition, Erasure correction, CLV&CAV controller
    – Subcode decoder (CD-Text, CD-Graphic I/F)
    – Shock proof memory controller, Disturbance detector
    – Decimation filter
■ ACTUATORS DRIVING MODE SELECTABLE between PWM or PDM MODE
■ 256Fs / 384Fs (16.9344MHz) CLOCK INPUT.