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OV6620 Fiches technique(PDF) 27 Page - List of Unclassifed Manufacturers |
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OV6620 Fiches technique(HTML) 27 Page - List of Unclassifed Manufacturers |
27 / 31 page 14 May 1999 Version 1.11 27 OV6620/OV6120 SINGLE IC CMOS COLOR AND B/W DIGITAL CAMERAS OMNIVISION TECHNOLOGIES, Inc. Advanced Information Preliminary 15 COMD 01 RW Common Control D COMD[7] - reserved bit. COMD[6] - PCLK polarity selection. “0” OV6620 output data at PCLK falling edge and data bus will be stable at PCLK rising edge; “1” rising edge output data and stable at PCLK falling edge. When OV6620 work as CCIR656 format, COMB4=1, this bit is disable and should use PCLK rising edge latch data bus. COMD[5:1] - reserved bit. COMD[0] - U V digital output sequence exchange control. 1 - UV UV ... for 16-bit, U Y V Y ... for 8-bit; 0 - V U V U ... for 16Bit and V Y U Y ... for 8 Bit. 16 FSD 03 RW Field Slot Division FSD[7:2] - Field interval selection. Odd Even mode defined by FD[1:0] 000000 - disable digital data output, only output black reference level. 000001 - divide to 2 slots, HREF is active one in every 2 field/frame 000010 - divide to 4 slots, HREF is active one in every 4 field/frame 000100 - divide to 8 slots, HREF is active one in every 8 field/frame 001000 - divide to 16 slots, HREF is active one in every16 field/frame 010000 - divide to 32 slots, HREF is active one in every 32 field/frame 100000 - divide to 64 slots, HREF is active one in every 64field/frame FSD[1:0]- field mode selection. Each frame consists of two fields: Odd & Even, these bits defines the assertion of HREF in relation to the two fields. 00 - OFF mode; HREF is not asserted in both fields, one exception is the single frame transfer operation (see the description for the register 13) 01 - ODD mode; HREF is asserted in odd field only. 10 - EVEN mode; HREF is asserted in even field only. 11 - FRAME mode; HREF is asserted in both odd field and even field. FD[7:2] useless. 17 HREFST 38 RW Horizontal HREF Start HS[7:0] - selects the starting point of HREF window, each LSB represents two pixels for CIF resolution mode, one pixels for QCIF resolution mode, this value is set based on an internal column counter, the default value corresponds to 352 horizontal window. Maximum window size is 356. see window description below. HS[7:0] programmable range is [38]- [EB], and should less than HE[7:0]. HS[7:0] should be programmable to value larger than or equal to [38]. Value larger than [EC] is invalid. See window description below. 18 HREFEND EA RW Horizontal HREF End HE[7:0] - selects the ending point of HREF window, each LSB represents two pixels for full resolution and one pixels for QCIF resolution, this value is set based on an internal column counter, the default value corresponds to the last available pixel. The HE[7:0] programmable range is [39] - [EC]. HE[7:0] should be larger than HS[7:0] and less than or equal to [EC]. Value larger than [EC] is invalid. See window description below. 19 VSTRT 03 RW Vertical Line Start VS[7:0] - selects the starting row of vertical window, in full resolution mode, each LSB represents 1 scan line in one frame. see window description below. Min. is [03], max. is [93] and should less than VE[7:0]. 1A VEND 92 RW Vertical Line End VE[7:0]- selects the ending row of vertical window, in full resolution mode, each LSB represents 1 scan line in one frame, see window description below. Min. is [04], max. is [94] and should larger than VS[7:0]. 1B PSHFT 00 RW Pixel Shift PS[7:0] - to provide a way to fine tune the output timing of the pixel data relative to that of HREF, it physically shifts the video data output time late in unit of pixel clock as shown in the figure below. This function is different from changing the size of the window as is defined by HS[7:0] & HE[7:0] in register 17&18. Higher than default number shifts the pixel in delay(right) direction, the highest number is “FF”. so maximum shift number is: Late: 256 pixels. 1C MIDH 7F R Manufacture ID Byte: High MIDH[7:0] - read only, always returns “7F” as manufacturer’s ID no. 1D MIDL A2 R Manufacture ID Byte: Low MIDL[7:0] - read only, always returns “A2” as manufacturer’s ID no. 1E Rsvrd1E C4 R reserved 1F Rsvrd1F 04 R reserved Subad- dress (hex) Register Default (hex) Read/ Write Descriptions |
Numéro de pièce similaire - OV6620 |
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Description similaire - OV6620 |
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