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MT9M131 Scheda tecnica(PDF) 31 Page - ON Semiconductor |
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MT9M131 Scheda tecnica(HTML) 31 Page - ON Semiconductor |
31 / 50 page MT9M131 www.onsemi.com 31 SENSOR CORE REGISTERS Sensor registers are generally updated before the next FV is asserted. See the column titled “Synced to Frame Start” in Table 13 for per-register information. Notation Used in the Sensor Core Register Description Table Sync’d to Frame Start • 0 = Not applicable, for example, read-only register • N = No. The register value is updated and used immediately • Y = Yes. The register value is updated at next frame start as long as the synchronize changes bit is “0”. Frame start is defined as when the first dark row is read out. By default, this is 8 rows before FV goes HIGH Bad Frame A bad frame is a frame where all rows do not have the same integration time, or offsets to the pixel values changed during the frame. • 0 = Not applicable, for example, read-only register • N = No. Changing the register value does not produce a bad frame • Y = Yes. Changing the register value might produce a bad frame • YM = Yes, but the bad frame is masked out unless the “show bad frames” feature is enabled Read/Write • R = Read-only register/bit • W = Read/write register/bit Table 13. SENSOR CORE REGISTER DESCRIPTIONS Bit Field Description Default (Hex) Synced to Frame Start Bad Frame Read/Write R0:0 − 0x000 − Chip Version (R/O) Bits 15:0 Hardwired read-only 0x143A R R1:0 − 0x001 − Row Start Bits 10:0 Row Start The first row to be read out (not counting dark rows that may be read). To window the image down, set this register to the starting Y value. Setting a value less than 8 is not recommended since the dark rows should be read using R0x022. 0xC Y YM W R2:0 − 0x002 − Column Start Bits 10:0 Col Start The first column to be read out (not counting dark columns that may be read). To window the image down, set this register to the starting X value. Setting a value below 0x18 is not recommended since readout of dark columns should be controlled by R0x022. 0x1E Y YM W R3:0 − 0x003 − Window Height Bits 10:0 Window Height Number of rows in the image to be read out (not counting dark rows or border rows that may be read). 0x400 Y YM W R4:0 − 0x004 − Window Width Bits 10:0 Window Width Number of columns in image to be read out (not counting dark columns or border columns that may be read). 0x500 Y YM W R5:0 − 0x005 − Horizontal Blanking − Context B Bits 10:0 Horizontal Blanking B Number of blank columns in a row when context B is chosen (R0x0C8[0] = 1). If set smaller than the minimum value, the minimum value is used. With default settings, the minimum horizontal blanking is 202 columns in full-power readout mode and 114 columns in low-power readout mode. 0x184 Y YM W R6:0 − 0x006 − Vertical Blanking − Context B Bits 14:0 Vertical Blanking B Number of blank rows in a frame when context B is chosen (R0x0C8[1] = 1). This number must be equal to or larger than the number of dark rows read out in a frame specified by R0x022. 0x2A Y N W |
Codice articolo simile - MT9M131_17 |
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