CXD1948R 查看數據表（PDF） - Sony Semiconductor
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CXD1948R Datasheet PDF : 78 Pages
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CXD1948R
5-2-4. Transmit Interface
The CXD1948R is designed for use not only in transmitting an entire input transport stream, but also in
transmitting one program only in the stream. The packet for transmission is selected through PACKETEN input
as in the diagram below.
Moreover, constraints are imposed in the packet intervals of streams that can be input to the CXD1948R.
Each time the CXD1948R receives one packet of transport stream data, it adds time stamp data and data from
the host I/F, and there must be an interval of 500ns or more for this processing. The timing is illustrated below.
Also, the PACKETEN input signal must input “HIGH” while the first data of the transport stream packet is being
sent. The maximum period for PACKETENABLE signal high is the period that the transport stream packet data
is valid.
The timing charts for synchronous/asynchronous interface are shown below.
Transmit Interface Limits
MPEG2 transporter
AIDT
PACKETEN
CXD1948R
Transmission of Program A
AIDT
A
B
A
A
B
A
A
PACKETEN
500ns (min)
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