TDA7522

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1.0 DESCRIPTION

TDA7522 is a single chip processor consisting of Decoder, Servo and 1bit D/A for 4times CD-ROM / CD-

Audio. Main concept of this IC is that it is based on embedded System Micro Controller which allows cus-

tomer to develop system software very easily: just based on provided commands. Further the microcon-

troller is fully customer dedicated in terms of both software and general purpose Port.

By combination of ST Analog front-end IC (TDA7521), all CD functions including Shock Proof Memory

Controller and CD-Text function can be realized.

The TDA7522 portfolio is constituted by three different versions:

– ’development’: which gives the possibility to have at disposal the complete sw development environ-

ment, by means of a dedicated package

– ‘in field development’: standard package but with selection of program memory: on chip RAM, on chip

ROM. The program RAM is fully patchable through the standard IIC interface, giving the possibility of

sw changing while chip is working in the real environment.

– ‘production’: standard package, but with software permanently stored in the on chip ROM.

2.0 TECHNOLOGY

All version are produced using the HCMOS6 0.35um technology which works @3.3Vdc; to avoid interface

problem with existing logics, all digital Inputs are 5V tolerant. When interfacing logic on TDA7522 outputs,

a next issue of this data sheet.

3.0 ADDITIONAL FEATURES

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16Mbit DRAM I/F allows maximum 9 seconds shock proof

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Built-in 1bit Delta Sigma modulation for DAC

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Subcode P,Q and R-W decoding

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Error Correction is capable of Dual C1 and quadruple C2 erasure corrections

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Jitter absorbing capability: +/- 6 frames

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Automatic fine gain/balance/offset adjustment for tracking and focus servos

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Built-in Digital Silence detection

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Built-in EFM Demodulation/Sync Rear and Forward protection

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Soft audio mute

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Built-in Digital PLL with large capture range from 0.5 to 4 times speed

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Digital Servo control for all servo loops

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Capable of 2x and 4x speeds for shock proof and CD-ROM applications

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Capable of wide temperature range (-40C to +85C) stable operation

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Fast access times for CD-ROM applications due to wide Capture range and CAV mode run at max 4

times overspeed

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CLV or CAV (lock-to-disk mode) spindle servo operations

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Digital Output SPDIF (DIT CP340)

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Sony LSI Output Interface (for Audio & CD-ROM)

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Pulsate SLED mode support

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Built in 8times Audio Over sampling filter.