L64105 LSI Logic Corporation, L64105 Datasheet - Page 24

• Manufacturer Part Number: L64105
• Description: Mpeg-2 Audio/video Decoder
• Manufacturer: LSI Logic Corporation

Figure 1.1
Satellite in
1.2 L64105 Overview
1-2
Cable in
L647X4
L64768
Demod
Demod
A Typical L64105 Application
QPSK
QAM
Or
The L64105 accepts an 8-bit, parallel channel input from a transport
demultiplexer and, with interaction of a host microcontroller,
decompresses and decodes the channel information into separate, serial
video and audio streams. The L64105 handles NTSC and PAL formats
and provides a Sony/Philips Digital Interface (S/P DIF) formatted output
stream.
Figure 1.2
the:
The Host Interface includes 512, 8-bit registers (some not used), read
and write FIFOs, and byte enable logic. The host and L64105
communicate with each other exclusively through the registers. An
external interrupt signal from the L64105 alerts the host about internal
events, such as picture start code detection. Separate I/O signals are
used for handshaking. The L64105 can interface with either an Intel or
Motorola type processor by tying an external pin high or low.
Introduction
Host Interface
Channel Interface
Memory Interface
Video Decoder
Video Interface
Audio Decoder
Integrated
X-PORT
L64X08
DRAM
4 Mbit
shows a block diagram of the L64105. Its major blocks include
CPU
MPEG-2
Decoder
SDRAM
L64105
16 Mbit
A/V
L64X08 EBUS
Optional
16 Mbit SDRAM
NTSC/PAL
Encoder
S/P DIF
Audio
DACs
Baseband
Stereo
Audio
Video