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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8259 датащи(PDF) 8 Page - Wolfson Microelectronics plc |
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WM8259 датащи(HTML) 8 Page - Wolfson Microelectronics plc |
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8 / 26 page  WM8259 Production Data w PD Rev 4.2 April 2007 8 INPUT VIDEO SAMPLING Figure 1 Input Video Timing Note: 1. See Page 15 (Programmable VSMP Detect Circuit) for video sampling description. Test Conditions AVDD = DVDD1 = DVDD2 = 3.3V, AGND = DGND = 0V, TA = 25 °C, MCLK = 18MHz unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS MCLK period tPER 55.5 ns MCLK high period tMCLKH 25 ns MCLK low period tMCLKL 25 ns VSMP period tVPER 300 ns VSMP set-up time tVSMPSU 6 ns VSMP hold time tVSMPH 3 ns Video level set-up time tVSU 10 ns Video level hold time tVH 3 ns Reset level set-up time tRSU 10 ns Reset level hold time tRH 3 ns Notes: 1. tVSU and tRSU denote the set-up time required after the input video signal has settled. 2. Parameters are measured at 50% of the rising/falling edge. MCLK VSMP INPUT VIDEO t PER t VSMPSU t VSMPH t VSU t VH t RSU t RH t MCLKL t MCLKH t VPER t RSU |
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