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ASX340CS датащи(PDF) 54 Page - ON Semiconductor |
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ASX340CS датащи(HTML) 54 Page - ON Semiconductor |
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54 / 74 page ![]() ASX340CS_DS Rev. F Pub. 6/15 EN 54 ©Semiconductor Components Industries, LLC, 2015. ASX340CS: 1/4-Inch Color CMOS NTSC/PAL Digital Image Sensor Modes and Timing I/O Timing Digital Output By default, the ASX340CS launches pixel data, FV, and LV synchronously with the falling edge of PIXCLK. The expectation is that the user captures data, FV, and LV using the rising edge of PIXCLK. The timing diagram is shown in Figure 36. As an option, the polarity of the PIXCLK can be inverted from the default by program- ming R0x0016[14]. Figure 36: Digital Output I/O Timing Note: PIXCLK can be inverted from the default by programming R0x0016[14]. Table 26: Parallel Digital Output I/O Timing fEXTCLK = 27 MHz; VDD = 1.8V; VDD_IO = 2.8V; VAA = 2.8V; VAA_PIX = 2.8V; VDD_PLL = 2.8V; VDD_DAC = 2.8V; Default slew rate Signal Parameter Conditions Min Typ Max Unit EXTCLK fextclk max ±100 ppm 6 27 54 MHz textclk_period 18.52 37 166.67 ns Duty cycle 45 50 55 % PIXCLK1 fpixclk 6 27 54 MHz tpixclk_period 18.52 37.04 166.67 ns Duty cycle 45 50 55 % DATA[7:0] tpixclkf_dout 1.55 – 1.9 ns tdout_su 18 – 20 ns tdout_ho 18 – 20 ns FV/LV tpixclkf_fvlv 1.6 – 3.05 ns tfvlv_su 15 – 16 ns tfvlv_ho 20 – 21 ns EXT CLK PIXC LK D OUT [7:0] F R AM E_VALID LIN E _VALID t pixclkf_dout t pixclkf_fvlv Input O utput O utput O utput t fvlv_su t fvlv_ho t dout_ho t dout_su t extclk_period |
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