TDA7522 Datasheet (ST Microelectronics)

TDA7522, Digital Servo & Decoder

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 microco

TDA7522 Digital Servo & Decoder PRODUCT PREVIEW s 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

TDA7522 Features

* s s s s s s s s s s s s s s 16Mbit DRAM I/F allows maximum 9 seconds shock proof Built-in 1bit Delta Sigma modulation for DAC Subcode P,Q and R-W decoding Error Correction is capable of Dual C1 and quadruple C2 erasure corrections Jitter absorbing capability: +/- 6 frames Automatic fine gain/balanc