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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.