GENERAL DESCRIPTION
The Digital Servo Integrated Circuit Silent (DSICS) IC provides all servo functions except the spindle motor control in two-stage Compact Disc (CD) systems. It offers a high degree of integration, combined with the low additional cost of external components. The servo characteristics are widely adjustable by means of a three-wire serial interface, which offers great flexibility for the application of different CD mechanisms

FEATURES
The DSICS realizes the following servo functions:
• Focus servo loop
• Radial servo loop
• Built-in access procedure
• Sledge motor servo loop
• Three line (TDA1301T-like; same on hardware level, coefficients differ) or I2C-bus serial interface with system controller.

Other features are:
• Single supply voltage (5 V)
• Flexible system oscillator
• Usable for single/double Foucault and astigmatic focus
• Wide range of adjustable servo characteristics possible
• Automatic focus start-up procedure and in-lock indication
• Fast focus restart procedure
• Sophisticated track loss detection mechanism
• Extended radial error signal
• Automatic initialization and jump procedure for radial servo
• Automatic radial error gain and offset control
• Sophisticated defect detector
• Shock detector
• Fast serial communication
• Low noise servo loops
• Automatic gain control for the complete focus and radial loop
• Fast track counting signal input
• Steered sledge jump
• Radial actuator damping.

Features that improve on its predecessor, the TDA1301T:
• Low noise in the focus loop
• Faster serial communication
• Improved jump performance.

Added features are:
• High level watchdogs
• Decoder (LO9585, LO9588 or HD60) communication support
• Application debugging support
• Pulsed sledge mode
• Auto gain control on radial and focus loop
• I2C-bus serial communication
• Externally available defect detector signals.