SAA7335 Datasheet, PDF (2/36 Pages) NXP Semiconductors – DSP for CD and DVD-ROM systems

Philips Semiconductors
DSP for CD and DVD-ROM systems
Preliminary specification
SAA7335
FEATURES
• Compatibility with CD-I, CD-ROM, MPEG-video
DVD-ROM and DVD-video applications
• Designed for very high playback speeds
• Typical CD-ROM operation up to n = 12, DVD-ROM to
n = 1.9, maximum rates (tbf)
• Matched filtering, quad-pass error correction
(C1-C2-C1-C2), overspeed audio playback function
included (up to 3 kbytes buffer)
• Lock-to-disc playback, Constant Angular Velocity
(CAV), pseudo-Constant Linear Velocity (CLV) and CLV
motor control loops
• Interface to 32 kbytes SRAM for DVD error correction
and de-interleave
• Sub-code/ header processing for DVD and CD formats
• Programmable HF equalizer
• In DVD mode it is still compatible with Philips block
decoders
• Sub-CPU interface can be parallel or fast I²C-bus
• On-chip clock multiplier.
GENERAL DESCRIPTION
This device is a high-end combined Compact Disc (CD)
and Digital Versatile Disc (DVD) compatible decoding
device. The device operates with an external 32 kbytes
S-RAM memory for de-interleaving operations. The device
provides quad-pass error correction for CD-ROM
applications (C1-C2-C1-C2) and operates in lock-to-disk,
CAV, pseudo CLV and CLV modes.
In DVD modes double-pass C1-C2 error correction is used
which is capable of correcting up to 5 C1 frame errors and
16 C2 frame errors.
The SAA7335 contains all the functions required to
decode an EFM or EFM+ HF signal directly from the laser
pre-amplifier, including analog front-end, PLL data
recovery, demodulation and error correction. The spindle
motor interface provides both motor control signals from
the demodulator and, in addition, contains a tachometer
loop that accepts tachometer pulses from the motor unit.
The SAA7335 has two independent microcontroller
interfaces. The first is a serial I²C-bus and the second is a
standard 8-bit multiplexed parallel interface. Both of these
interfaces provide access to a total of 32 × 8-bit registers
for control and status.
This data sheet contains an descriptive overview of the
device together with electrical and timing characteristics.
For a detailed description of the device refer to the user
guide “SAU/UM96018”.
Supply of this CD/DVD IC does not convey an implied
license under any patent right to use this IC in any CD or
DVD application.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
V_DDD
I_DDD
V_DDA
I_DDA
f_xtal
T_amb
T_stg
digital supply voltage
digital supply current
analog supply voltage
analog supply current
crystal input frequency
operating ambient temperature
storage temperature
MIN.
4.5
−
4.5
−
4
−20
−55
TYP.
5.0
70
5.0
70
25
−
−
MAX.
5.5
300
5.5
300
tbf
+70
+125
UNIT
V
mA
V
mA
MHz
°C
°C
1997 Aug 11
2