参数资料
型号: IP-SDI
厂商: Altera
文件页数: 56/140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
3–26
Chapter 3: Functional Description
Block Description
Figure 3–15 and Figure 3–16 show how one or two consecutive missing EAVs do not
cause the trs_locked signal to deassert.
Figure 3–15. Single Missing EAV Signal
data
Error in EAV
SAV
EAV
SAV
EAV
SAV
trs_strobe
prev_eav_missed
g host_eav
trs_locked
Figure 3–16. Two Consecutive Missing EAV Signal
data
1st error in EAV
SAV
EAV
SAV
2nd error in EAV
SAV
trs_strobe
prev_eav_missed
g host_eav
trs_locked
Figure 3–17 shows how three consecutive missing EAVs cause the trs_locked signal
to deassert.
Figure 3–17. Three Consecutive Missing EAV Signal
1st error in EAV
SAV
3rd error in EAV
SAV
data
EAV
SAV
2nd error in EAV
SAV
trs_strobe
prev_eav_missed
g host_eav
trs_locked
The frame_locked signal detects TRS EAV, inspects the transition of field (F) and
vertical (V) synchronizations, and then counts the line number. The inspecting
transitions on the F and V synchronizations provide the frame timing. The line count
value is stored if there is a rising or falling edge on the F and V synchronizations
through the frame. The stored count values are compared over multiple frames to
make sure they are stable, before the frame_locked signal is asserted.
The frame_locked signal deasserts when there are bad F or V synchronizations, or
when there is a rising edge from frame to frame. The frame_locked signal also
deasserts when the trs_locked signal deasserts.
When the frame_locked signal is zero, the frame is invalid, and the receiver is not
considered to receive reliable video data.
Serial Digital Interface (SDI) MegaCore Function
User Guide
February 2013 Altera Corporation
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IP-SDRAM/HPDDR 功能描述:开发软件 DDR SDRAM Control MegaCore RoHS:否 制造商:Atollic Inc. 产品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors