ade3000 STMicroelectronics, ade3000 Datasheet - Page 44

• Manufacturer Part Number: ade3000
• Description: Lcd Display Engines With Integrated Dvi, Adc And Yuv Ports
• Manufacturer: STMicroelectronics

Data Measurement Block
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2.12.6 V Position Min / Max
2.12.7 DE Size
DMEAS_ALG_CTRL
The first and last pixels are measured for each line, and the earliest first and latest last for the
selected pixel area are reported out at the end of the measurement. The intention is that "last data
pixel plus one" minus "first data pixel" is equal to the horizontal width of the video format.
Vertical position measures the start and end of video data in hsyncs relative to the posedge of
vsync.
Data vertical start is defined as the number of hsyncs between posedge of vsync and the "first data
pixel line".
First data pixel line definition is the first line with at least one pixel greater then the programmable
threshold.
Data vertical end is defined as the number of hsyncs between posedge of vsync and the "first
blanking line after data plus one". The first blanking line is detected and confirms that each
subsequent line contains no data pixels. The confirmation of the first blanking line measurement
ends at the posedge of vsync.
First blanking line after data definition is the row after the last row with at least one pixel greater than
the programmable threshold.
The first and last data pixel lines are measured within a frame. The earliest first and latest last data
pixels corresponding to the selected pixel area are reported out at the end of the measurement. The
intention is that "data vertical end plus one" minus "data vertical start" is equal to the vertical height
of the video format.
DE Size measures the number of INCLKs per data enable. DVI input measures precisely the input
image horizontal size.
At the end of the measurement (DE falling edge), the measured value is compared to a
programmed expected value +/- a programmed threshold. If the expected value is within the
threshold, the DE_size_mismatch flag is not set. If the measued size is outside the threshold, the
DE_size_mismatch flag is set.
In Free-running mode, results are updated at every line. The DE_size_mismatch flag is set at DE
falling edge and reset at DE rising edge.
In One-shot mode, results are updated once and kept until they are cleared by software. The
DE_size_mismatch flag can only be cleared when the reset flag bit is set by software.
Register Name
Table 16: Data Measurement Registers (Sheet 1 of 5)
0x0900
Addr
R/W
R/W
R/W
Mode
[7:5]
[4]
[3]
[2:0]
Bits
0x0
0x0
0x0
Default
Reserved
Interlace Mode Enable
0: use data valid (TV mode only)
1: use data enable for data valid
Algorithm
0x0: PHM Edge Intensity & Pixel Sum
0x1: DMM Min / Max
0x2: DMM PCD
0x3: DMM H position and V position
0x4: DMM DE size
0x5 - 0x7: Reserved
Description
ADE3XXX