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MT9M011 Datasheet(PDF) 15 Page - Micron Technology |
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MT9M011 Datasheet(HTML) 15 Page - Micron Technology |
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15 / 41 page  PDF: 09005aef81051c04/Source: 09005aef8102abe8 Micron Technology, Inc., reserves the right to change products or specifications without notice. MT9M011_2.fm - Rev. D 1/05 EN 15 ©2004 Micron Technology, Inc. All rights reserved. MT9M011 - 1/3-Inch Megapixel Image Sensor Two-wire Serial Interface Sample Write and Read Sequences Preliminary‡ Eight-Bit Write Sequence To be able to write one byte at a time to the register a special register address is added. The 8-bit write is done by first writing the upper 8 bits to the desired register and then writing the lower 8 bits to the special register address (Reg0xF1). The register is not updated until all 16 bits have been written. It is not possible to just update half of a regis- ter. In Figure 10 a typical sequence for 8-bit writing is shown. The second byte is written to the special register (Reg0xF1). Figure 10: Timing Diagram Showing a Write to Reg0x09 with the Value 0x0284 Eight-Bit Read Sequence To read one byte at a time the same special register address is used for the lower byte. The upper 8 bits are read from the desired register. By following this with a read from the special register (Reg0xF1) the lower 8 bits are accessed (Figure 11). The master sets the no-acknowledge bits. Figure 11: Timing Diagram Showing a Read from Reg0x09; Returned Value 0x0284 STOP Reg0xF1 ACK START 0xBA ADDR ACK SDATA SCLK ACK ACK ACK ACK Reg0x09 0xBA ADDR 0000 0010 1000 0100 START START 0xBB ADDR SDATA SCLK STOP NACK ACK ACK ACK Reg0x09 START 0xBA ADDR 0000 0010 START 0xBB ADDR SDATA SCLK NACK ACK ACK ACK Reg0xF1 START 0xBA ADDR 1000 0100 |
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