No.11S098-03
24
STC-GE33OX/GEC33OX
Users guide Rev. 1.03
3.2.3 Important design consideration of data timing and handling
In the design process of the video processing program, follow the below conditions of the data timings.
1) DIN (image data), LVALIN and FVALIN are activated at the rising edges of CLKIN as the data comes into the
user FPGA.
2) As the data sent back to the Sentech FPGA, add the delay equivalent to the process time in the user FPGA
on LVALIN and FVALIN.
3) As the data is sent back to the Sentech FPGA, DIN (image data), LVALIN and FVALIN must be activated at
the rising edges of CLKIN.
CLKIN: 36.81MHz
CLKIN
DIN [11:0]
LVALIN
FVALIN
D0
D1
D2
D3
D4
Dx
CLKIN
DOUT [11:0]
LVALOUT
FVALOUT
D0
D1
D2
D3
D4
Dx
Number of clock for
image processing
Number of clock for
image processing
Number of pixel in 1 horizontal
Number of pixel in 1 horizontal
Fig. 5 The image data input timing to user configurable FPGA
Fig.6 The image data output timing form user configurable FPGA after image processing