mt9v011ia9stces aptina, mt9v011ia9stces Datasheet - Page 15

• Manufacturer Part Number: mt9v011ia9stces
• Description: Mt9v011 1/4-inch Vga Digital Image Sensor
• Manufacturer: aptina

Eight-Bit Write Sequence
Figure 11:
Eight-Bit Read Sequence
Figure 12:
PDF:0560901182/Source 6061803135
MT9V011_IBGA_DS - Rev. C 6/10 EN
SDATA
SDATA
SDATA
SCLK
SCLK
SCLK
START
START
START
Timing Diagram Showing a Write to Reg0x09 with the Value 0x0284
Timing Diagram Showing a Read from Reg0x09; Returned Value 0x0284
0xBA ADDR
0xBA ADDR
0xBA ADDR
ACK
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 eight bits to the desired register and
then writing the lower eight bits to the special register address (Reg0x80). The register is
not updated until all 16 bits have been written. It is not possible to just update half of a
register. In Figure 11 a typical sequence for 8-bit writing is shown. The second byte is
written to the special register (Reg 0x80).
To read one byte at a time the same special register address is used for the lower byte.
The upper eight bits are read from the desired register. By following this with a read from
the special register (Reg0x80) the lower eight bits are accessed (Figure 12). The master
sets the no-acknowledge bits shown.
Reg0x09
ACK
ACK
ACK
Reg0x09
Reg0x80
0000 0010
ACK
ACK
ACK
15
START
START
START
0xBA ADDR
MT9V011 1/4-INCH VGA DIGITAL IMAGE SENSOR
0xBB ADDR
0xBB ADDR
ACK
ACK
ACK
Reg0x80
Aptina reserves the right to change products or specifications without notice.
ACK
0000 0010
1000 0100
©2009 Aptina Imaging Corporation. All rights reserved.
1000 0100
NACK
ACK
STOP
Preliminary
STOP