Visible to Intel only — GUID: bhc1411020008511
Ixiasoft
Visible to Intel only — GUID: bhc1411020008511
Ixiasoft
7.2. Control Port
Initially, the IP is disabled and does not transmit any data or video. However, the Clocked Video Input IP still detects the format of the clocked video input and raise interrupts; and the Clocked Video Output IP still accepts data on the Avalon streaming video interface if the input FIFO buffer has space.
The sequence for starting the output of the IP:
- Write a 1 to Control register bit 0.
- Read Status register bit 0. When this bit is 1, the IP starts transmitting data or video. The transmission starts on the next start of frame or field boundary.
Note: For the Clocked Video Input IP, the frame or field matches the Field order parameter settings.
The sequence for stopping the output of the IP:
- Write a 0 to Control register bit 0.
- Read Status register bit 0. When this bit is 0, the IP stops transmitting data. The transmission ends on the next start of frame or field boundary.
Note: For Clocked Video Input IP, the frame or field matches the Field order parameter settings.
The starting and stopping of the IP synchronize to a frame or field boundary.
Video Format | Field Order | Output |
---|---|---|
Interlaced | F1 first | Start, F1, F0, ..., F1, F0, Stop |
Interlaced | F0 first | Start, F0, F1, ..., F0, F1, Stop |
Interlaced | Any field first | Start, F0 or F1, ... F0 or F1, Stop |
Progressive | F1 first | No output |
Progressive | F0 first | Start, F0, F0, ..., F0, F0, Stop |
Progressive | Any field first | Start, F0, F0, ..., F0, F0, Stop |
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