mt9v032 aptina, mt9v032 Datasheet - Page 18

• Manufacturer Part Number: mt9v032
• Description: 1/3-inch Wide-vga Cmos Digital Image Sensor
• Manufacturer: aptina

8-Bit Write Sequence
Figure 11:
8-Bit Read Sequence
Figure 12:
PDF: 6538045704/Source:2194051501
MT9V022_DS - Rev. C 9/10 EN
S
SCLK
DATA
START
Timing Diagram Showing a Bytewise Write to R0x09 with the Value 0x0284
Timing Diagram Showing a Bytewise Read from R0x09; Returned Value 0x0284
S
S
SCLK
SCLK
DATA
DATA
0xB8 ADDR
START
START
To be able to write 1 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 (R0xF0). 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 on page 19, a typical sequence for 8-bit writing is shown. The second byte is
written to the special register (R0xF0).
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 (R0xF1) the lower 8 bits are accessed (Figure 12). The master sets the no-
acknowledge bits shown.
ACK
0xB8 ADDR
0xB8 ADDR
R0x09
ACK
ACK
ACK
0000 0010
R0x09
Two-Wire Serial Interface Sample Read and Write Sequences
R0xF0
ACK
19
MT9V032: 1/3-Inch Wide-VGA Digital Image Sensor
ACK
ACK
START
0xB8 ADDR
START
START
0xB9 ADDR
0xB9 ADDR
ACK
Aptina reserves the right to change products or specifications without notice.
R0xF0
ACK
ACK
ACK
©2005 Aptina Imaging Corporation. All rights reserved.
1000 0100
0000 0010
1000 0100
ACK
NACK
STOP
STOP