GS1560A/GS1561 Data Sheet
SD MODE
PCLK
DOUT[19:0]
DATA
Control signal
output
t
OH
t
OD
Figure 3-8: SD PCLK to Data Timing
3.11.2 Parallel Output in SMPTE Mode
When the device is operating in SMPTE mode, (see SMPTE Functionality on
page 38), both SD and HD data may be presented to the output bus in either
multiplexed or demultiplexed form depending on the setting of the 20bit/10bit input
pin.
In 20-bit mode, (20bit/10bit = HIGH), the output data will be word aligned,
demultiplexed luma and chroma data. Luma words will always appear on
DOUT[19:10] while chroma words will occupy DOUT[9:0].
In 10-bit mode, (20bit/10bit = LOW), the output data will be word aligned,
multiplexed luma and chroma data. The data will be presented on DOUT[19:10],
and the device will force DOUT[9:0] LOW.
3.11.3 Parallel Output in DVB-ASI Mode
When operating in DVB-ASI mode, (see DVB-ASI Functionality on page 45), the
GS1560A/GS1561 automatically configures the output port for 10-bit operation
regardless of the setting of the 20bit/10bit pin.
The extracted 8-bit data words will be presented on DOUT[17:10] such that
DOUT17 = HOUT is the most significant bit of the decoded transport stream data
and DOUT10 = AOUT is the least significant bit.
In addition, DOUT19 and DOUT18 will be configured as the DVB-ASI status
signals SYNCOUT and WORDERR respectively. See Status Signal Outputs on
page 46 for a description of these DVB-ASI specific output signals.
DOUT[9:0] will be forced LOW when the GS1560A/GS1561 is operating in
DVB-ASI mode.
3.11.4 Parallel Output in Data-Through Mode
When operating in Data-Through mode, (see Data Through Mode on page 46), the
GS1560A/GS1561 presents data to the output data bus without performing any
decoding, descrambling or word-alignment.
27360 - 8 September 2005
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GENNUM [ GENNUM CORPORATION ]
