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OV7411 Datasheet(PDF) 13 Page - List of Unclassifed Manufacturers |
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OV7411 Datasheet(HTML) 13 Page - List of Unclassifed Manufacturers |
13 / 18 page December 7, 1999 Version 1.4 13 OV7910P/OV7410P/OV7411P SINGLE IC CMOS COLOR & B/W PAL ANALOG CAMERAS OMNIVISION TECHNOLOGIES, Inc. Preliminary in one bus cycle. A multi-byte cycle overwrites its original subaddress; therefore, if a read cycle immediately follows a multi-byte cycle, you must insert a single-byte write cycle that provides a new subaddress. The OV7910P/OV7410P/OV7411P supports a single slave ID. The ID is preset to 80 write and 81 for read. In the write cycle, the second byte in I2C bus is the subaddress for selecting the individual on-chip registers, and the third byte is the data associated with this register. Writing to an undefined subaddress is ignored. In the read cycle, the second byte is the data associated with the previous stored subaddress. Reading of unde- fined subaddresses returns unknown data. 2.2 Register Set The table below provides a list and description of available I2C registers contained in the OV7910P/OV7410P/ OV7411P image sensor. Table 5. I2C Registers Subad- dress (hex) Register Default (hex) Read/ Write Descriptions 00 Gain[6:0] 00 RW GC[7] - unimplemented bit, returns ‘X’ when read. GC[6:0] – Storage for the current AGC Gain setting. This register is updated automatically. If AGC is enabled, the internal control stores the optimal gain value in this register. IF AGC is not enabled, a “00” is stored in this register. 01 Blue[7:0] 80 RW Storage for the current blue channel setting for white balance control. BLU[7] – “0” decrease gain, “1” increase gain. BLU[6:0] – blue channel gain balance value. Note: This function is not available on the OV7410P/OV7411P Image Sensor. 02 Red[7:0] 80 RW Storage for the current red channel setting for white balance control. RED[7] – “0” decrease gain, “1” increase gain. RED[6:0] – red channel balance value. Note: This function is not available on the OV7410P/OV7411P Image Sensor. 03 Sat D0 RW SAT[7:0] – saturation adjustment. “FFh”- highest, “00h”-lowest Note: This function is not available on the OV7410P/OV7411P Image Sensor. 04 Cnt 00 RW CTR[7:0] – contrast adjustment. “FFh”-highest, “00h”-lowest 05 Brt 80 RW BRT[7:0] – brightness adjustment. “FFh”-highest,“00h”-lowest 06 Rsvd06 B2 RW reserved 07 Blue Bias 20 RW BBS[7:6] – rsvd (BBS[7:6] = 00) BBS[5:0] – blue channel bias value. This value defines the fine tune adjustment for the blue tint in the white balance control. This reg- ister is the manual control portion of the AWB control Note: This function is not available on the OV7410P/OV7411P Image Sensor. Figure 5. Data Transfer on the I2C Bus The OV7910P/OV7410P/OV7411P I2C supports multi- byte write and multi-byte read. The master must supply the subaddress. in the write cycle, but not in the read cycle. Therefore, the OV7910P/OV7410P/OV7411P takes the read subaddress from the previous write cycle. In multi-byte write or multi-byte read cycles, the subaddress is automatically increment after the first data byte so that continuous locations can be accessed SDA SCL S A SLAVE ID RW SUB ADD |
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