参数资料
型号: IP-SDI
厂商: Altera
文件页数: 52/140页
文件大小: 0K
描述: IP VIDEO INTERFACE - SDI
标准包装: 1
系列: *
类型: MegaCore
功能: 视频系统用串行数字接口
许可证: 初始许可证
3–22
Chapter 3: Functional Description
Block Description
Receiver Clocks
The transceiver requires a receiver reference clock, rx_serial_refclk . This clock
trains the receiver PLL in the transceiver.
For HD-SDI operation, the clock must be nominally 1/20 th of the serial data rate. The
clock does not have to be frequency locked to the data, because the design only uses it
for the training of the receiver PLL.
For SD-SDI operation, the clock must be nominally 1/4 th of the serial data rate
(for example, 67.5 MHz). The clock does not have to be frequency locked to the data.
For dual or triple standard operation, the receiver reference clock must be 148.5 MHz.
In this mode, the transceiver oversamples the SD-SDI signals by a factor of 11.
All receiver interfaces can share a common receiver reference clock.
Table 3–8 shows the receiver clock rx_serial_refclk frequencies.
Table 3–8. Receiver Clock Frequency—Arria GX, Arria II GX, Arria V, Cyclone IV GX, Cyclone V,
Stratix II GX, Stratix IV, and Stratix V Devices
SD-SDI
Video Standard
Clock Frequency (MHz)
67.5
HD-SDI (including dual link)
74.175/74.25
Dual or triple standard
148.35/148.5
3G-SDI
Notes to Table 3–8 :
(1) You can use either reference clock for training.
(2) Must be 148.5 MHz for correct SD-SDI operation.
148.35/148.5
Serial Digital Interface (SDI) MegaCore Function
User Guide
February 2013 Altera Corporation
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