SAA7335 Datasheet, PDF (29/36 Pages) NXP Semiconductors – DSP for CD and DVD-ROM systems

Philips Semiconductors
DSP for CD and DVD-ROM systems
Preliminary specification
SAA7335
APPLICATION INFORMATION
The complete data path chipset consists of two ICs, the CD decoder (or DSP) device and the block decoder/host
interface manager. In addition to these components a general purpose microcontroller and tracking servo is necessary
to produce a complete controller system for a DVD mechanism. The DSP, block decoder and microcontroller are shown
highlighted in Fig.21. An ADC application circuit is illustrated in Fig.22.
handbook, full pa_Mge_Ew_Cidt_Hh _{ANISM/SERVO SUBSYSTEM}
spindle
motor
laser
SLED/FOCUS
ACTUATORS
PRE-
AMPLIFIER
SERVO CONTROL
PD TRACKING
(3 BEAM OPTIONAL FOR
BACKWARD CD-ROM
COMPATIBILITY)
DECODER/DATA PATH SUBSYSTEM
RAM BUFFER
AUDIO DAC
audio L/R
output
CD-DSP
DEMODULATION
C1-C2 ERROR CORRECTOR
BLOCK
DECODER
(FOR CD-ROM
COMPATIBILITY)
AND
HOST
INTERFACE
PC host
interface
SYSTEM
CONTROLLER
RAM BUFFER
user
key
switches
MGK255
Fig.21 Basic DVD player block diagram.
1997 Aug 11
29