參數(shù)資料
型號(hào)： GS1532-CF
廠商： Gennum Corporation
英文描述： GS1532 HD-LINX-TM II Multi-Rate Serializer
中文描述： GS1532的HD - LINX進(jìn)程，商標(biāo)第二多速率串行器
文件頁(yè)數(shù)： 29/52頁(yè)
文件大?。?/td> 512K
代理商： GS1532-CF
GS1532 Data Sheet
21498 - 6
June 2005
29 of 52
3.4 DVB-ASI mode
The GS1532 is said to be in DVB-ASI mode when the SMPTE_BYPASS pin is set
LOW and the DVB_ASI and SD/HD pins are set HIGH.
In this mode, all SMPTE processing functions are disabled, and the 8-bit transport
stream data will be 8b/10b encoded prior to serialization.
3.4.1 Control Signal Inputs
In DVB-ASI mode, the DIN19 and DIN18 pins will be configured as DVB-ASI
control signals INSSYNCIN and KIN respectively.
When INSSYNCIN is set HIGH, the device will insert K28.5 sync characters into
the data stream. This function is used to assist system implementations where the
GS1532 may be preceded by an external data FIFO. Parallel DVB-ASI data may
be clocked into the FIFO at some rate less than 27MHz. The INSSYNCIN input
may then be connected to the FIFO empty signal, thus providing a means of
padding up the data transmission rate to 27MHz. See
Figure 3-3
.
NOTE: 8b/10b encoding will take place after K28.5 sync character insertion.
KIN should be set HIGH whenever the parallel data input is to be interpreted as any
special character defined by the DVB-ASI standard (including the K28.5 sync
character). This pin should be set LOW when the input is to be interpreted as data.
NOTE: When operating in DVB-ASI mode, DIN[9:0] become high impedance.
Figure 3-3: DVB-ASI FIFO Implementation using the GS1532
3.5 Data-Through Mode
The GS1532 may be configured by the application layer to operate as a simple
parallel-to-serial converter. In this mode, the device presents data to the output
buffer without performing any scrambling or encoding.
Data-through mode is enabled only when both the SMPTE_BYPASS and
DVB_ASI pins are set LOW.
8
8
AIN ~ HIN
PCLK = 27MHz
INSSYNCIN
SDO
SDO
CLK_IN
CLK_OUT
FIFO
WRITE_CLK
<27MHz
FE
TS
KIN
GS1532
KIN
READ CLK
=27MHz
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