| DVD Chipset |  Need more information? |
|
The recently introduced DVD chipset with embedded microcontrollers allows the
system designer to take advantage of totally integrated functionality while
supporting all DVD and CD Writeable and Re- Writeable standards currently in
use. Traditional solutions have resulted in interface and control components
being located separately on the same circuit board, whereas the total
solution chipset reduces board space and minimizes design time by combining 5
component elements with embedded ARM7TDMI and microcontrollers to provide
superior performance and complete programmability. These components include
an Interface Controller, 78C1501, a Servo System 78C1502, a Read Channel
78C1503, a Laser Power Controller 78C1504 and its adjunct device the 78C1507
providing all of the controls and features necessary to enable fast product
design. Firmware is also provided.
The chipset has been designed to function as a total system, eliminating the
dozen or so additional "glue" components usually required in traditional
designs, to combine components from multiple suppliers. This further reduces
design complexity, board space and power consumption. Using the chipset,
drive designers can accomplish the entire electronic package in as little as
5000 square mm, a dramatic reduction from the 20000 sq. mm typically required
in traditional multi-supplier implementations. The chipset interfaces
seamlessly with T08X series of Laser Drivers, typically deployed with the
laser on the Optical Pickup Unit (OPU). The Interface Controller, 78C1501,
contains ARM and microcontrollers, buffer management, Error Correction Code
(ECC) and Encoder/Decoder (ENDEC) for DVD and CD. Also included is a
Writeable Control Store for timing generation and an on-board frequency
synthesizer to generate system frequencies from one crystal. I2S interfaces
are provided.
The Servo System, 78C1502, provides all of the control requirements for DVD
and CD mechanisms including programmable control for coarse and fine
tracking, focus, sled, draw motor and tilt. Three parallel programmable
microcontrollers are the heart of the system providing a range of servo
sample rates. Real time notch filters can also be calculated.
The Read Channel solution, 78C1503 with 78C1507 adjunct device, programmable
through a serial port, is fully featured for all standards.
78C1504 is a pre-programmed automatic device for controlling the write and
read pulses to a Laser Diode Power Amplifier. All of the present DVD and CD
write strategies are provided in the device, included also is Automatic Power
Control (APC) and Optimum Power Control (OPC). Though the device is
pre-programmed, it is possible through a serial interface to adjust pulse
timing, width and amplitude. Five DACs are provided to individually control
the Laser Diode Power Amplifier. Packaging for inclusion on the PCBA or on
the OPU is available.
Value proposition
The industry's first multi-format integrated DVD chipset is a result of
intense collaboration within the marketplace to provide the DVD system
engineer with a solution that will significantly reduce design time and lower
overall system costs. Designed to function as a total system, eliminating
the dozen or so additional "glue" components usually required in traditional
designs. The new Chipset is in the unique position to help drive the industry
to continue producing smaller, more efficient end products with a higher
degree of cost effectiveness.
|
