mt9v011p11st Micron Semiconductor Products, mt9v011p11st Datasheet - Page 14

• Manufacturer Part Number: mt9v011p11st
• Description: 1/4-inch Vga Cmos Active-pixel Digital Image Sensor
• Manufacturer: Micron Semiconductor Products

Eight-Bit Write Sequence
a special register address is added. The eight-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
Eight-Bit Read Sequence
address is used for the lower byte. The upper eight bits
are read from the desired register. By following this
09005aef80c6407f
MT9V011_external_DS_2.fm - Rev. A 8/04 EN
Figure 12: Timing Diagram Showing a Read from Reg0x09; Returned Value 0x0284
To be able to write one byte at a time to the register
To read one byte at a time the same special register
Figure 11: Timing Diagram Showing a Write to Reg0x09 with the Value 0x0284
SDATA
SDATA
SDATA
SCLK
SCLK
SCLK
START
START
START
0xBA ADDR
0xBA ADDR
0xBA ADDR
ACK
Reg0x09
ACK
ACK
ACK
Reg0x09
Reg0x80
0000 0010
ACK
ACK
ACK
14
1/4-INCH VGA CMOS ACTIVE-PIXEL
START
START
START
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 eight-bit writing is shown. The
second byte is written to the special register (Reg
0x80).
with a read from the special register (Reg0x80) the
lower eight bits are accessed (Figure 12). The master
sets the no-acknowledge bits shown.
0xBA ADDR
0xBB ADDR
0xBB ADDR
Micron Technology, Inc., reserves the right to change products or specifications without notice.
ACK
DIGITAL IMAGE SENSOR
ACK
ACK
Reg0x80
ACK
0000 0010
1000 0100
1000 0100
NACK
©2004 Micron Technology, Inc.
Preliminary
ACK
STOP
STOP