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NOIL1SM0300A Datasheet(PDF) 11 Page - ON Semiconductor |
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NOIL1SM0300A Datasheet(HTML) 11 Page - ON Semiconductor |
11 / 29 page NOIL1SM0300A www.onsemi.com 11 Table 11. ADVANTAGES AND DISADVANTAGES OF NON DESTRUCTIVE READOUT Advantages Disadvantages Low noise because it is a true CDS. System memory required to record the reset level and the interme- diate samples. High sensitivity because the conversion capacitance is kept rather low. Requires multiples readings of each pixel, thus higher data throughput. High dynamic range because the results includes signal for short and long integrations times. Requires system level digital calculations. Sequencer The sequencer generates the complete internal timing of the pixel array and the readout. The timing can be controlled by the user through the SPI register settings. The sequencer operates on the same clock as the ADCs. This is a division by 4 of the input clock. Table 12 shows a list of the internal registers with a short description. In the next section, the registers are explained in more detail. Table 12. INTERNAL REGISTERS Address Bits Name Description 0 (0000) 10:0 SEQUENCER Default <10:0>: 00000101001 1 mastermode 1: master mode; 0: slave mode 1 ss 1: ss in y; 0: no subsampling 2 gran clock granularity 1 enable_analog_out 1: enabled; 0: disabled 1 calib_line 1: line calibration; 0 frame calibration 1 res2_en 1: enable DS; 0: Disable DS 1 res3_en 1: enable TS; 0: Disable TS 1 reverse_x 1: readout in reverse x direction 0: readout in normal x direction 1 reverse_y 1: readout in reverse y direction 0: readout in normal y direction 1 Ndr 1: enable non destructive readout 0: disable non destructive readout 1 (0001) 7:0 START_X Start pointer X readout Default <7:0>: 00000000 2 (0010) 8:0 START_Y Start pointer Y readout Default <8:0>: 000000000 3 (0011) 7:0 NB_PIX Number of kernels to read out (4 pixel kernel) Default <7:0>: 10100000 4 (0100) 11:0 RES1_LENGTH Length of reset pulse (in number of lines) Default <11:0>: 000000000010 5 (0101) 11:0 RES2_TIMER Position of reset DS pulse in number of lines Default <11:0>: 000000000000 6 (0110) 11:0 RES3_TIMER Position of reset TS pulse in number of lines Default <11:0>: 000000000000 7(0111) 11:0 FT_TIMER Position of frame transfer in number of lines Default <11:0>: 000111100001 8 (1000) 7:0 VCAL DAC input for vcal Default <7:0>: 01001010 |
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