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AS3688 Datasheet(PDF) 29 Page - ams-OSRAM AG |
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AS3688 Datasheet(HTML) 29 Page - ams-OSRAM AG |
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29 / 72 page  AS3688 austriami crosyst ems Datasheet, Confidential www.austriamicrosystems.com (ptr,tje) Revision 1.1.1 / 20060707 27 - 70 In strobe mode, a timeout timer protects the flash leds with a settable timeout of 100ms to 1600ms. This timer has the following modes: Flash time defined by timeout timer (Ts) independent of strobe signal (Mode 1) Flash time limited to timeout or end of strobe pulse (Mode 2) Flash time identical to strobe pulse time (Mode 3) GPIO1 can be programmed to be used as TXMasking function. This function quickly reduces the current during strobing from strobe levels to preview levels. The timeout counter is not affected by this input. Figure 16 – Flash Mode 1 – Flash time defined by timeout timer (Ts) independent of strobe signal (Strobe on) Figure 17 – Flash Mode 2 – Flash time limited to timeout or end of strobe pulse Strobe Current Level (defined by curr3x_strobe and curr3x_strobe_high) Preview Current Level (defined by curr3x_preview) TX Masking-function reduce current during flash (GPIO1 if txmask_on=1) Preview on (Software trigger or GPIO2) Strobe on (Software trigger or GPI3) Preview Current Level (defined by curr3x_preview) TX Masking-function reduce current during flash (GPIO1 if txmask_on=1) Preview on (Software trigger or GPIO2) Strobe on (Software trigger or GPI3) Strobe Current Level (defined by curr3x_strobe and curr3x_strobe_high) |
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