saa6752hs NXP Semiconductors, saa6752hs Datasheet - Page 15

• Manufacturer Part Number: saa6752hs
• Description: Mpeg-2 Video And Mpeg-audio/ac-3 Audio Encoder With Multiplexer
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7
7.1
7.1.1
The SAA6752HS has a multi-processor architecture.
The different processing and control modules are not
locked to each other but run independently within the limits
of the global scheduling. The data transfer between the
processing units is carried out via FIFO memories or the
external SDRAM. The device is configured and the
operation modes are selected via the I
7.1.2
There are five operating modes:
1. Idle. This mode is set after applying a hard reset (i.e.
2004 Jan 26
handbook, full pagewidth
MPEG-2 video and MPEG-audio/AC-3
audio encoder with multiplexer
on power-up). In this mode the SAA6752HS can be
initialized by the host to the required configuration.
Video and audio processing is disabled. A hard reset
always resets the SAA6752HS configuration
parameters back to the default states.
FUNCTIONAL DESCRIPTION
System operation
G
O
ENERAL
PERATING MODES
Power-
down
HARD RESET
HARD RESET
SLEEP
2
applied
C-bus.
power
Idle
Fig.3 Mode transition diagram.
RECONFIGURE
ENABLE
RECONFIGURE
START
Stop
15
2. Stop. In Stop mode, the video and audio input
3. Encode. In this mode, the multiplexer output is
4. Paused. This mode allows the SAA6752HS to make
5. Power-down. In this mode, the internal clock is
processing is enabled but the multiplexer output
remains disabled. It is possible to read status
information on the input video and audio signals via
the I
cannot be modified, except to some specific dynamic
encoding parameters (i.e. bit rate setting).
enabled. Like Stop mode, only dynamic encoding
parameters can be modified in this mode.
seamless transitions. Restarting from Paused mode
will generate a stream output with sequential time
stamps and MPEG buffer model content.
disabled, sending the SAA6752HS into a
(non-functional) power saving state. A hard reset will
re-initialize the SAA6752HS.
START
STOP
2
C-bus. The SAA6752HS initialization settings
Encode
START
PAUSE
Paused
MHC130
SAA6752HS
Product specification