Altera Video and Image Processing Suite Manual do Utilizador descarregar pdf (Página 99)

Address Register Description

9 F1 Total Line Count The detected line count of the video streams F1 field including

blanking.

10 Standard The contents of the vid_std signal.

11 SOF Sample Start of frame line register. The line upon which the SOF

occurs measured from the rising edge of the F0 vertical sync.

12 SOF Line SOF line register. The line upon which the SOF occurs

measured from the rising edge of the F0 vertical sync.

13 Refclk Divider Number of cycles of vid_clk (refclk) before refclk_div

signal triggers.

14 Reserved Reserved for future use.

15 Ancillary Packet Start of the ancillary packets that have been extracted from the

incoming video.

15 + Depth of

ancillary

memory

End of the ancillary packets that have been extracted from the

incoming video.

Table 4-22: Clocked Video Output Registers

The rows in the table are repeated in ascending order for each video mode. All of the ModeN registers are write

only.

Address Register Description

0 Control

• Bit 0 of this register is the Go bit:

• Setting this bit to 1 causes the CVO IP core start video

data output.

• Bits 3, 2, and 1 of the Control register are the interrupt

enables:

• Setting bit 1 to 1, enables the status update interrupt.

• Setting bit 2 to 1, enables the locked interrupt.

• Setting bit 3 to 1, enables the synchronization outputs

(vid_sof, vid_sof_locked, vcoclk_div).

• When bit 3 is set to 1, setting bit 4 to 1, enables frame

locking. The CVO IP core attempts to align its vid_sof

signal to the sof signal from the CVI IP core.

4-40

Clocked Video Interface Control Registers

UG-VIPSUITE

2015.05.04

Altera Corporation

Clocked Video Interface IP Cores

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Altera Video and Image Processing Suite Manual do Utilizador Página 99