GS9060 Data Sheet
3.8.1 Transport Packet Format
Transport packet structure shall conform to the specifications of EN/ISO/IEC
13818-1 and ETS 300 429 for Transport Stream Packets. The packet length can
be 188 or 204 bytes.
3.8.2 DVB-ASI 8b/10b Decoding and Word Alignment
After serial-to-parallel conversion, the internal 10-bit data bus is fed to the DVB-ASI
8b/10b decode and word alignment block. The function of this block is to word align
the data to the K28.5 sync characters, and 8b/10b decode and bit-swap the data
to achieve bit alignment with the data outputs.
The extracted 8-bit data will be presented to DOUT[17:10], bypassing all internal
SMPTE mode data processing.
NOTE: When operating in DVB-ASI mode, DOUT[9:0] are forced LOW.
3.8.3 Status Signal Outputs
In DVB-ASI mode, the DOUT19 and DOUT18 pins will be configured as DVB-ASI
status signals SYNCOUT and WORDERR respectively.
SYNCOUT will be HIGH whenever a K28.5 sync character is present on the output.
This output may be used to drive the write enable signal of an external FIFO, thus
providing a means of removing the K28.5 sync characters from the data stream.
Parallel DVB-ASI data may then be clocked out of the FIFO at some rate less than
27MHz. See Figure 3-4.
WORDERR will be high whenever the device has detected an illegal code word.
AOUT ~ HOUT
DDI
DDI
TS
8
8
FIFO
GS9060
FE
FF
WORDERR
WORDERR
PCLK = 27MHz
SYNCOUT
CLK_IN
WE
READ_CLK
<27MHz
CLK_OUT
Figure 3-4: DVB-ASI FIFO Implementation using the GS9060
22208 - 8 January 2007
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