THC7984 Datasheet, PDF (38/45 Pages) THine Electronics, Inc. – 10-bit 3-channel Video Signal Digitizer

THC7984_Rev.2.0_E
R2C[3:2] Port-1 Input Sync Type Detection
R2C[1:0] Port-0 Input Sync Type Detection
The result of Input Sync Type Detection can be read.
< Input Sync Type Detection >
HSYNC VSYNC SOGIN Input Sync Type
Not Active
Not Active
Not Active
Not Active
Active
Active
Active
Active
Not Active Not Active
Not Active Active
Active Not Active
Active Active
Not Active Not Active
Not Active Active
Active Not Active
Active Active
No Signal
Sync on Video
No Signal
Sync on Video
Composite Sync
Composite Sync
Separate Sync
Separate Sync
R2C[3:2]
R2C[1:0]
11b
10b
11b
10b
01b
01b
00b
00b
R2D[2] VSYNC Input Polarity Detection
The result of VSYNC Input Polarity Detection can be read.
0: Input polarity is Active-Low.
1: Input polarity is Active-High.
R2D[1] HSYNC Input Polarity Detection
The result of HSYNC Input Polarity Detection can be read.
0: Input polarity is Active-Low.
1: Input polarity is Active-High.
R2D[0] Sync on Video 2-level / 3-level Detection
When the result of Input Sync Type Detection of the selected input port (R12[3]) is Sync on Video (R2C[6:5],
R2C[4:3]=10b) , the result of Sync on Video 2-level / 3-level Detection can be read.
0: Sync on Video is 2-level.
1: Sync on Video is 3-level.
* When Input Sync Type is not Sync on Video, 0 can be read.
R2E[7] Interlace Detection
The result of Interlace Detection detected by the HSYNC and VSYNC input can be read.
0: Input signal is non-interlace (progressive) .
1: Input signal is interlace.
R2E[6:0] / R2F[7:0] Vertical Total Line Measurement
The result of Vertical Total Line Measurement measured by the HSYNC and VSYNC input can be read in 1/4 line unit.
R30[7:0] VSYNC Input Pulse Width Measurement
The result of VSYNC Input Pulse Width Measurement measured by the HSYNC and VSYNC input can be read in 1/4
line unit.
R31[2] Reserved * Must be set to 0 (Default Value: 0)
R31[1] External REFCLK Input Enable
1: It is possible to measure the horizontal period (R32[3:0] / R33[7:0] / R34[7:0]) by inputting clock which is 7 - 40 MHz
to CLAMP-pin. The frequency precision of the input clock influences a result of measurement directly, so please input
the clock with the high frequency precision.
* If the external REFCLK input is enable (R31[1]=1) , the function of external clamp pulse (R16[2]) can not be used.
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