GENERAL DESCRIPTION

The SAA7370A (CD7) is a single chip combining the functions of a CD decoder IC and digital servo IC. The decoder part is based on the SAA7345 (CD6) with an improved error correction strategy. The servo part is based on the TDA1301T (DSIC2) with improvements incorporated, extra features have also been added.

FEATURES

• CD-ROM mode

• Up to 8 times-speed mode

• Lock-to-disc mode

• Full error correction strategy, t = 2 and e = 4

• Full CD graphics interface

• All standard decoder functions implemented digitally on chip

• FIFO overflow concealment for rotational shock resistance

• Digital audio interface (EBU), audio and data

• 2 and 4 times oversampling integrated digital filter, including fs mode

• Audio data peak level detection

• Kill interface for DAC deactivation during digital silence

• All TDA1301 (DSIC2) digital servo functions, plus extra high level functions

• Low focus noise

• Improved playability on ABEX TCD-721R, TCD-725 and TCD-714 discs

• Automatic closed-loop gain control available for focus and radial loops

• Pulsed sledge support

• Up to 80 kHz (8.4672 MHz crystal) or 16 MHz (16.9344 MHz crystal) jump performance

• Electronic damping of fast radial actuator during long jump

• Microcontroller loading LOW

• High level servo control option

• High level mechanism monitor

• Communication may be via TDA1301/SAA7345 compatible bus or I2C-bus

• On-chip clock multiplier allows the use of 8.4672 MHz crystal for up to 4 times speed mode or 16.9344 MHz crystal for up to 8 times-speed mode.