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.