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NOIV1SN1300A Datasheet(PDF) 12 Page - ON Semiconductor |
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NOIV1SN1300A Datasheet(HTML) 12 Page - ON Semiconductor |
12 / 76 page NOIV1SN1300A, NOIV2SN1300A http://onsemi.com 12 OPERATING MODES The VITA 1300 sensor is able to operate in the following shutter modes: • Global Shutter Mode ♦ Pipelined Global Shutter - Master - Slave ♦ Triggered Global Shutter - Master - Slave • Rolling Shutter Mode Global Shutter Mode In the global shutter mode, light integration takes place on all pixels in parallel, although subsequent readout is sequential. Figure 6 shows the integration and readout sequence for the synchronous shutter. All pixels are light sensitive at the same period of time. The whole pixel core is reset simultaneously and after the integration time all pixel values are sampled together on the storage node inside each pixel. The pixel core is read out line by line after integration. Note that the integration and readout can occur in parallel or sequentially. Figure 6. Global Shutter Operation Pipelined Global Shutter In pipelined global shutter mode, the integration and readout are done in parallel. Images are continuously read and integration of frame N is ongoing during readout of the previous frame N-1. The readout of every frame starts with a Frame Overhead Time (FOT), during which the analog value on the pixel diode is transferred to the pixel memory element. After the FOT, the sensor is read out line per line and the readout of each line is preceded by the Row Overhead Time (ROT). Figure 7 shows the exposure and readout time line in pipelined global shutter mode. • Master In this operation mode, the integration time is set through the register interface and the sensor integrates and reads out the images autonomously. The sensor acquires images without any user interaction. Figure 7. Integration and Readout for Pipelined Shutter Reset N Exposure Time N Reset N+1 Exposure Time N+1 Readout Frame N-1 FOT FOT Readout Frame N FOT Integration Time Handling Readout Handling ROT Line Readout FOT FOT • Slave The slave mode adds more manual control to the sensor. The exposure time registers are ignored in this mode and the integration time is controlled by an external pin. As soon as the control pin is asserted, the pixel array goes out of reset and integration starts. The integration continues until the external pin is de-asserted by the system. Now, the image is sampled and the readout is started. Figure 8 shows the relation between the external trigger signal and the exposure/readout timing. |
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