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2004 Jan 26 32
Philips Semiconductors Product specification
MPEG-2 video and MPEG-audio/AC-3
audio encoder with multiplexer
SAA6752HS
7.8.4.2 DIO slave mode
The SAA6752HS can be enabled in a DIO slave mode where the data receiver acts as master. PDO, PDOSYNC and
PDOAV are clocked out by the internal clock; earliest two internal clock cycles e.g. 36 to 58 ns after the falling edge of
the external clock. The external clock PDIOCLK should not exceed a maximum of 9 MHz. The PDOVAL signal still
indicates if data is available in the output buffer. To operate in this mode, the PDIDS request input must be set to logic 1.
handbook, full pagewidth
MHC137
OUTPUT INTERFACE
SAA6752HS
DATA RECEIVER
PDIOCLK
PDOSYNC
PDOAV
PDO
[
7:0
]
PDOVAL
DATA
CLOCK
DSYNC
AUDIO/VIDEO QUALIFIER
VALID
'1'
PDIDS
Fig.10 DIO slave mode protocol.
handbook, full pagewidth
MHC138
10 00 01 BA
PDIOCLK
PDO
[
7:0
]
PDOVAL
Fig.11 Data transfer in DIO slave mode.