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2004 Jan 26 39
Philips Semiconductors Product specification
MPEG-2 video and MPEG-audio/AC-3
audio encoder with multiplexer
SAA6752HS
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9I
2
C-BUS CONTROL AND STATUS REGISTERS
Tables 13 to 26 list the I
2
C-bus instructions intended for functional control and status.
Column M identifies the SAA6752HS modes that are valid for each I
2
C-bus instruction. The key is:
I - write and/or read valid in Idle mode
P- write and/or read valid in Paused mode
S - write and/or read valid in Stop mode
E - write and/or read valid in Encode mode
All - write and/or read valid in Idle, Encode, Paused and Stop mode.
Table 13 I
2
C-bus control
Note
1. Paused mode transitions are not applicable to transport stream and DIO output mode combination, only transport stream and DEBI output mode
combination.
ADR
HEX
M
COMMAND
NAME
R/W SIZE/POSITION PARAMETER/RANGE DEFAULT DESCRIPTION
00 all soft reset W none none − This command resets the SAA6752HS to its
default settings.
01 I enable W none none − go to Stop mode from Idle mode
02 I, P, S start W none none − go to Encode mode
03 E stop W none none − go to Stop mode from Encode mode
04 E pause
(1)
W none none − go to Paused mode from Encode mode
05 E, P, S reconfigure W none none − go to Idle mode
06 I sleep W none none − go to Power-down mode
07 E, P, S forced
reconfigure
W none none − Go to Idle mode without completing the
current GOP/audio frame. This is intended for
use in cases similar to no video/audio input
present.
08 I enable system
time-out
R/W 1 byte disabled Enables SAA6752HS to time-out to Idle mode
if STOP to IDLE transition cannot be
completed (i.e. due to no video signal being
present). If a general error event is detected,
the SAA6752HS will automatically switch to
Idle mode via forced reconfigure.
bit 0 = 1 enabled
bit 0 = 0 disabled