поискавой системы для электроныых деталей |
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MTV412MV128 датащи(PDF) 11 Page - List of Unclassifed Manufacturers |
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MTV412MV128 датащи(HTML) 11 Page - List of Unclassifed Manufacturers |
11 / 26 page MYSON-CENTURY TECHNOLOGY MTV412M (Rev 0.9) Revision 0.9 - 11 - April 2002 6.1 Composite SYNC separation/insertion The MTV412M continuously monitors the input HSYNC. If the vertical SYNC pulse can be extracted from the input, a CVpre flag is set and users can select the extracted "CVSYNC" for the source of polarity check, frequency count, and VBLANK output. The CVSYNC then has 8us delay compared to the original signal. The MTV412M can also insert pulse to HBLANK output during composite VSYNC’s active time. The width of insert pulse is 1/8 HSYNC period and the insertion frequency can adapt to original HSYNC. The insert pulse of HBLANK can be disabled or enabled by setting “NoHins” control bit. If “NoHins” bit is set to "1", HBLANK output will be same as HSYNC input (of course, polarity can be controlled by HBpl bit). 6.2 H/V Frequency Counter MTV412M can discriminate HSYNC/VSYNC frequency and save the information in XFRs. The 14-bit Hcounter counts the time of 64xHSYNC period, then loads the result into the HCNTH/HCNTL latch. The output value is then [(128000000/H-Freq) - 1], updated once per VSYNC/CVSYNC period when VSYNC/CVSYNC is present or continuously updated when VSYNC/CVSYNC is non-present. The 12-bit Vcounter counts the time between two VSYNC pulses, then loads the result into the VCNTH/VCNTL latch. The output value is then (62500/V-Freq), updated every VSYNC/CVSYNC period. An extra overflow bit indicates the condition of H/V counter overflow. The VFchg/HFchg interrupt is set when VCNT/HCNT value changes or overflows. Table 6.2.1 and Table 6.2.2 show the HCNT/VCNT value under the operations of 12MHz. Hpol CVpre Vbpl VSYNC Digital Filter Polarity Check & Sync Seperator Vpre Present Check Vfreq Vpol Polarity Check & Freq. Count XOR VBLANK Vself XOR HSYNC Digital Filter CVSYNC Present Check Hpre Hfreq Present Check & Freq. Count XOR Hbpl XOR HBLANK Composite Pulse Insert H/V SYNC Processor Block Diagram |
Аналогичный номер детали - MTV412MV128 |
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Аналогичное описание - MTV412MV128 |
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