GS9092A datasheet(33/61 Pages) SEMTECH

Part #	GS9092A

Description	270Mb/s Serializer for SDI and DVB-ASI

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Manufacturer	SEMTECH [Semtech Corporation]

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GS9092A GenLINX® III 270Mb/s Serializer for SDI and

DVB-ASI

Final Data Sheet

34715 - 5

February 2013

33 of 61

Figure 3-7: Ancillary Data Insertion

%%

ANC_DATA_SWITCH = HIGH

ANC_DATA_SWITCH bit is toggled HIGH. New ancillary data is written

to second half of FIFO starting at adress zero. Application layer continues to

read from the first half of the FIFO.

Application layer

read pointer

Internal write

pointer

0

1023

0

Application layer

read pointer

Internal write

pointer

0

1023

ANC_DATA_SWITCH = LOW

0

1023

Internal write

pointer

Application layer

read pointer

ANC_DATA_SWITCH = HIGH

0

1023

ANC_DATA_SWITCH bit is toggled HIGH. New ancillary data is written to first half of

FIFO starting at address zero. Application layer continues to read from second half

of FIFO. Toggling ANC_DATA_SWITCH back LOW will clear the second half of the

FIFO and go back the situation depicted in box A.

Application layer

read pointer

Internal write

pointer

%%

0

ANC_DATA_SWITCH = LOW

1023

0

1023

ANC_DATA_SWITCH toggled LOW. First half of FIFO cleared and ancillary

data read from second half of FIFO. Device continues to write ancillary data

to second half of FIFO.

A

B

C

D

ANC_DATA

NOTE: At least 1100 PCLK cycles must pass between toggles of the ANC_DATA_SWITCH bit.

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