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PRELIMINARY DRAFT
CL-CS3712
Integrated AVI/ATAPI DVD
Drive Manager Datasheet
Features
• Integrates all required components for a complete AVI
or ATAPI interface DVD drive (front-end) electronics
solution:
- RF amp
- Data channel
- Servo control processor
- DVD ECC (error correction code)
- CSS (content scramble system)
- ATAPI decoder
• Reads DVD+RW, DVD-ROM, DVD-RW, CDDA, CD-
ROM, CD-R, CD-RW, VCD, and DVCD discs
• Direct Audio/Video interface for DVD player
applications
• ATAPI interface for game console and DVD loader
solutions
• High-performance controller supports DVD disc speeds
up to 8x and CD-ROM disc speeds up to 40x
• Partial Response Maximum Likelihood (PRML) data
channel
• Servo Control Processor (SCP) on-chip
• DVD navigation support
• 208-pin LQFP/EPAD packages
Overview
The CL-CS3712 is Cirrus Logic’s high-integration, high-
performance ATAPI DVD drive manager. It integrates all
required components for a DVD loader for DVD players,
game consoles, and DVD-ROM drives. The CL-CS3712
includes an RF amp, servo control processor, data
channel, DVD ECC, CSS authorization, CD-ROM
decoder, and ATAPI interface.
The CL-CS3712 can be configured with an audio DAC
(digital-to-analog converter), external buffer memory (8- or
16-bit DRAM), a local micro-controller with its RAM and
ROM, and power drivers to create a complete DVD-ROM
electronics solution.
The CL-CS3712 supports DVD disc speeds up to 8x and
Ultra DMA host speeds up to 33.3 Mbytes/sec.
The RF signal is over-sampled by a high-speed ADC
(analog-to-digital converter). The timing loop is closed in
the digital domain with variable decimation and
interpolation used to provide the output samples to the
data recovery logic. A channel-quality logic circuit is
provided to allow parametric calibration.
The CL-CS3712 data channel supports partial response
maximum likelihood (PRML) data acquisition, providing
state-of-the-art data recognition in a noisy environment,
coming from the pick-up head.
Block
Diagram
TO POWER
DRIVERS
FROM
IV AMP
SAMPLE
RATE GEN
VGA
ADCS
DACS
SPINDLE
CONTROL
RAM
SCP
CHANNEL
QUALITY
BAC
CAPTURE
SUM &
VGA
LOW PASS
FILTER
RF
ADC
SYNTHESIZER
DPLL &
DATA CHNL
LAYERED ECC
& DVD ECC
8/16
DEMOD
EFM
DEMOD
SUB-Q READ
C1/C2 ECC &
DE-INTERLEAVE
SUBCODE
DE-INTERLEAVE
HEADER
SEARCH &
CHECKS
MICRO
INTERFACE
CSS
AUTHENTIFICATION
FROM
SENSORS
LOCAL
MICROCONTROLLER
CSS
DESCRAMBLE
HOST
INTERFACE
NAVIGATION
BUFFER
MANAGER
ATAPI OR
MPEG
BUFFER
MEMORY
CL-CS3712
DS588PP1 - rev 0.4 April 11, 2002
©Copyright 2002 Cirrus Logic Inc.
CONFIDENTIAL
www.cirrus.com

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Features (Cont.)
RF Amp
• Provides laser power control
• Gain control in digital domain
• Generates focus error and tracking signal
• Provides RF signal for the data channel
• Bypass for external RF amp applications
Data Channel
• Digital PLL provides flexible control of center
frequency to support improved access times
• Channel quality provided for parametric calibration
• Channel data rates up to 210 Mbits/sec.
• Flexible and error-tolerant channel sync mark
windowing
SCP (Servo Control Processor)
• Includes a servo control processor for focus, tracking,
sled, and spindle servo loops
• Significantly faster capture for focus and tracking
• Effective in a wide range of parameter variations
• Superior response to defects, shock, and vibration
• Supports both CLV (constant linear velocity) and CAV
(constant angular velocity) modes
ECC
• Real-time DVD ECC error correction
• Real-time CD-ROM layered ECC error correction with
programmable number of sets of P-word and Q-word
corrections per sector (up to 64 total)
• C1/C2 ECC and de-interleaving
• Real-time subcode error correction in CD-DA
(compact disc digital audio) mode
Decoder
• Supports hardware streaming operation
• DVD navigation support
• Supports ADB (audio data buffering)
• Automatic target sector header search
• Hardware sector header validity check
• Supports high-speed Intel®- and Motorola®-type
microcontrollers
• Supports nonmultiplexed and multiplexed address
and data buses
PRELIMINARY DRAFT
Host Interface
• True real-time hardware/software ATAPI compatibility
• Supports Ultra DMA: capable of synchronous DMA
data rates up to 33.3 Mbytes/sec.
• Supports ATA PIO modes 3 and 4 transfers without
IOCHRDY
Host Interface (cont.)
• Supports DMA modes 1 and 2
• Hardware implementation of:
- ATAPI packet command
- ATAPI reset command
High-Performance
• PIO/DMA ATAPI bus transfer rate:
- PIO modes 3 and 4, multiword DMA modes 1
and 2, and singleword DMA modes 1 and 2
• Data transfer rate:
- CD-ROM CLV –maximum 32 × data rate with
25% overspeed capture
- CD-ROM CAV – maximum 40× OD data rate
- DVD-ROM CLV – maximum 6× data rate with
33% overspeed capture
- DVD-ROM CAV – maximum 8× OD data rate
- DVD+R CLV – max. 4x read
• Buffer bandwidth:
- 55 Mbytes per second with 16-bit DRAM
Buffer Manager
• Dual-port circular buffer control with access-priority
resolver
• Supports streaming operation
• Direct addressing of up to 4 Mbytes of DRAM
• Supports variable buffer segmentation
• Programmable timing control for SDRAM
• Host overrun control
• Supports 16-bit SDRAM
Overview (Cont.)
The CL-CS3712 servo control processor implements the
focus, tracking, sled, and spindle servo loops. An ADC is
provided to convert the focus and tracking error signal.
The outputs to the power drivers are linear DACs.
The CL-CS3712 supports real-time DVD ECC, CD-ROM
C1/C2, and layered ECC correction, which is
programmable for up to 64 P- and Q-word corrections per
sector. It also supports subcode R/W correction in CD-
DA (compact disc digital audio) mode.
The buffer manager controls the flow of data from the data
channel, through the ECC, and to either the host interface
or the serial audio channel. Data is stored and retrieved in
the external buffer memory using interleaved access
cycles. The buffer memory is implemented with SDRAM
devices. Up to 4 Mbytes of SDRAM can be directly
addressed by the CL-CS3712.
www.cirrus.com
CONFIDENTIAL
DS588PP1 - rev 0.4 April 11, 2002
©Copyright 2002 Cirrus Logic Inc.

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Features (Cont.)
Microcontroller Interface
• Supports high-speed Intel®- and Motorola®-type
microcontrollers
• Supports nonmultiplexed and multiplexed address
and data busses
• Interrupt or polled microcontroller interface
• Microcontroller access to six external switch settings
on the buffer bus
- Three-level power-down capability when idle,
automatic power-up when command is
received
PRELIMINARY DRAFT
Overview (Cont.)
www.cirrus.com
CONFIDENTIAL
DS588PP1 - rev 0.4 April 11, 2002
©Copyright 2002 Cirrus Logic Inc.

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PRELIMINARY DRAFT
Table of Contents
System Block Diagrams .........................................................................................................................1
DVD-ROM ...................................................................................................................1
DVD PLAYER ..............................................................................................................1
Functional Decriptions ............................................................................................................................2
Decoder .....................................................................................................................................2
DVD Mode ....................................................................................................................2
CD Form .......................................................................................................................3
Data Channel ............................................................................................................................4
Servo Channel...........................................................................................................................6
Pickup/Sensor Interface ...............................................................................................6
Servo Control Processor ..............................................................................................6
Servo DACs..................................................................................................................6
Register Map ..........................................................................................................................................8
Pinout Information ...............................................................................................................................13
Pinout Diagram .......................................................................................................................13
Pin Decriptions ........................................................................................................................14
Package And Order Information ...........................................................................................................19
Package Information ...............................................................................................................19
LQFP Ordering Information .....................................................................................................21
DS588PP1 - rev 0.4 April 11, 2002
©Copyright 2002 Cirrus Logic Inc.
CONFIDENTIAL
www.cirrus.com
iii

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System Block Diagrams
PRELIMINARY DRAFT
System Block Diagrams
DVD-ROM
BUFFER
MEMORY
CL-CS3712
DATA
CHANNEL DECODER
SPINDLE
SLED/TRACK/FOCUS
3
POWER
DRIVERS
RF AMP
SERVO
CONTROL
PROCESSOR
CSS
DVD/CD-ROM
ECC
HOST
INTERFACE
ATAPI
ROM
MC
DVD PLAYER
BUFFER
MEMORY
ROM
MC
IR USER LED
SENSOR CONTROL DISPLAY
CL-CS3712
DATA
CHANNEL DECODER
SPINDLE
SLED/TRACK/FOCUS
3
POWER
DRIVERS
RF AMP
SERVO
CONTROL
PROCESSOR
CSS
ROM
DVD/CD-ROM
ECC
MC
AC-3
AUDIO
DECODER
MPEG2
VIDEO
DECODER
6 CHANNEL 6
AUDIO
NTSC/PAL
ENCODER
BUFFER MEMORY
(2 MBYTES)
1 www.cirrus.com
CONFIDENTIAL
DS588PP1 - rev 0.4 April 11, 2002
©Copyright 2002 Cirrus Logic Inc.