参数资料
型号: IP-SDI
厂商: Altera
文件页数: 46/140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
3–16
Chapter 3: Functional Description
Block Description
Figure 3–9 shows the receiver clocks for different video standards.
Figure 3–9. Receiver Clocks
SD-SDI
Serial Data
SDI MegaCore
Function
rx_clk = 67.5 MHz
rx_data_valid_out
rx_clk
rx_data
V
V
V
V
rx_data_valid_out
67.5 MHz
HD-SDI
Serial Data
SDI MegaCore
Function
rx_clk = 74.25 MHz
rx_data_valid_out
rx_clk
rx_data
V
V
V
V
rx_data_valid_out
74.25/74.175 MHz
Dual Standard
Serial Data
SDI MegaCore
Function
rx_clk = 67.5 or 74 MHz
rx_data_valid_out
67.5 MHz
Transmitter Transceiver Interface
Altera provides a transceiver interface, which interfaces the transceiver to the SDI
function. The transceiver interface implements the following functions:
1
When using the two-times oversampling transmitters in Stratix GX devices, you
cannot have HD-SDI receivers in the same quad. The quad requires the same
frequency reference clocks for both the receivers and transmitters within a quad.
HD-SDI receivers and two-times oversampling transmitters have different frequency
reference clocks (refer to Table 3–5 and Table 3–6 on page 3–15 ).
Transmitter Retiming
The txdata parallel data input to the transceiver must be synchronous and phase
aligned to the tx_coreclk transceiver clock input. SD-SDI (and optionally HD-SDI)
requires a retiming function, because of the oversampling logic. The transmitter uses a
small 16 × 20 FIFO buffer for the retiming.
Serial Digital Interface (SDI) MegaCore Function
User Guide
February 2013 Altera Corporation
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