
CL-CR3470/CR3475
Product Bulletin
July 1998
ATAPI CD-R/RW
Encoder/Decoder
FEATURES
General
— Single-chip integration of CD-ROM decoder,
CD-ROM encoder, CIRC encoder, EFM modulator,
ATIP decoder, buffer manager, and interface to SCSI
protocol ICs
— DVD port (CL-CR3475 only)
— Highly automated and high-performance CD-Record-
able formatter
— High-performance CD-ROM decoder
— Designed for easy and efficient firmware
programming
— High-performance built-in ATAPI interface
— Fully compatible with the ATAPI Specification
SFF-8020
— Automatic power-down interfaces when idle
— 144- and 176-pin LQFP packages available
— Built-in clock synthesizer
I
CD-ROM Decoder
— Supports CD-ROM, CD-I, and CD-DA
(CD-Digital
Audio) formats
— Supports various compact disc DSP (digital signal
processor) controllers
— Supports disc speeds up to 65-MHz MCLK
— CD speeds up to 40x
The CL-CR3470 and CL-CR3475 are single-chip, high-
performance, highly integrated ATAPI interface devices
for the CD-R/RW (CD-Recordable/CD-Rewritable) mar-
ket. The CL-CR3470/CR3475 integrates CD-ROM
decoder, CIRC encoder, EFM modulation, ATIP
decoder, buffer manager, and ATAPI interface logic. In
addition to its CD-Rewritable capability, the CL-CR3475
features a DVD port enabling drive manufacturers to
develop a drive that reads DVD, CD-ROM, CD-R, and
CD-RW.
The CL-CR3470/CR3475 supports up to 40x read and
10x record disc speeds, allowing customers to preserve
all CD-R/E encode/decode electronics and firmware as
the disc speed requirements increase. All write
methods are supported by the CL-CR3470/CR3475
disc-at-once, track-at-once, packet recording, and
System and Functional
Block Diagram
ATAPI BUS
INTERFACE
MICROCONTROLLER
INTERFACE
BUFFER
MANAGER
LOCAL MICROCONTROLLER
BUFFER MEMORY
CD-ROM
DECODER
CL-CR3470/CR3475
CD-RW
ECC
ATAPI
BUS
CD-ROM
ENCODER
CD-RW
FORMATTER
DSP
CIRC
ENCODER
EFM
MODULATOR
ATIP
DECODER
SERVO
CONTROLLER
WRITE
STRATEGY
ROM/RAM
DAC
ADB
DVD
PORT
OVERVIEW
(cont.)
(cont.)