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2004 Jan 26 57
Philips Semiconductors Product specification
MPEG-2 video and MPEG-audio/AC-3
audio encoder with multiplexer
SAA6752HS
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Table 26 I
2
C-bus output interface
ADR
HEX
M COMMAND NAME R/W SIZE/POSITION PARAMETER/RANGE DEFAULT DESCRIPTION
D0 I R/W 1 byte Defines the output interface in one byte
(collects all sub parameter bits in one byte).
All states defined are the active states
output protocol bit[1:0] = 00 DIO slave mode DIO slave
mode
DIO master mode: SAA6752HS delivers the
clock signal.
DIO slave mode: SAA6752HS receives the
clock signal.
bit[1:0] = 01 DIO master mode
bit[1:0] = 10 not applicable
bit[1:0] = 11 DEBI slave mode
data valid pin
polarity
bit 2 = 0 positive positive for the DEBI output protocol negative
polarity has to be selected
bit 2 = 1 negative
high-impedance
on/off
bit 3 = 0 off on Selection of high-impedance for output pin.
bit3=1 on
audio/video pin
polarity
bit 4 = 0 audio HIGH, video LOW audio
HIGH,
video
LOW
bit 4 = 1 audio LOW, video HIGH
sync pin polarity bit 5 = 0 positive positive
bit 5 = 1 negative
data request pin
polarity
bit 6 = 0 negative negative
bit 6 = 1 positive
PDO clock
frequency
bit 7 = 0 9 MHz 9 MHz selection of clock frequency for DIO master
mode
bit 7 = 1 6.75 MHz
F6 I insert leading null
bytes
W 2 bytes number of bytes 00H Defines the number of leading null bytes
(00H), which are delivered to the output
before the start of the stream.
Remark: After forced reconfigure command
the default value of 00H will be set.