参数资料
型号: IP-SDI
厂商: Altera
文件页数: 126/140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
A–4
Appendix A: Constraints
Specifying TimeQuest Timing Analyzer Constraints
Table A–2. Step 2: Set Timing Exceptions (Part 2 of 2)
Standard
Set Multicycle
Paths
set_clock_group
set_false_path
(1)
Define Setup and Hold
Relationship
Setup—1.5 clocks
(4.43 ns) from the
switchline,
337.5-MHz zero-degree
Soft transceiver
SDI
get_clocks
receive_pcs0|clkout
clock to the 135-MHz
clock
(gxb_rxclk)
Hold—zero clocks from
the 337.5-MHz clock to
the 135-MHz clock
Note to Table A–2 :
(1) Switchline is an internal signal equivalent to the en_switch_reg signal in Figure 3–6 .
Table A–3. Step 3: Minimize the Timing Skew
Standard
SD-SDI
HD-SDI, HD-SDI dual link
3G-SDI
DR, TR
Soft transceiver SDI
Minimize Timing Skew
I/O to sample_a|b|c|d[0] path as short as possible
The following constraints are specifically used to constrain a duplex SDI MegaCore
function targeting Stratix IV device:
Specify Clock Characteristics
Use the following constraints for the TimeQuest timing analyzer:
SD-SDI ( rx_sd_oversample_clk_in = 67.5 MHz, tx_pclk = 27 MHz,
tx_serial_refclk = 67.5 MHz)
create_clock -name {rx_sd_oversample_clk_in} -period 14.814 -waveform { 0.000 7.407
} [get_ports {rx_sd_oversample_clk_in}]
create_clock -name {tx_pclk} -period 14.814 -waveform { 0.000 7.407 } [get_ports
{tx_pclk}]
create_clock -name {tx_serial_refclk} -period 14.814 -waveform { 0.000 7.407 }
[get_ports {tx_serial_refclk}]
HD-SDI, HD-SDI dual link ( rx_serial_refclk = 74.25 MHz, tx_pclk =
74.25 MHz, tx_serial_refclk = 74.25 MHz)
create_clock -name {rx_serial_refclk} -period 13.468 -waveform { 0.000
6.734 } [get_ports {rx_serial_refclk}]
create_clock -name {tx_pclk} -period 13.468 -waveform { 0.000 6.734 }
[get_ports {tx_pclk}]
Serial Digital Interface (SDI) MegaCore Function
User Guide
February 2013 Altera Corporation
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