mt9v011p11st Micron Semiconductor Products, mt9v011p11st Datasheet - Page 13

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

T wo-Wire Serial Interface Sample Read and Write Sequences
16-Bit Write Sequence
ister is shown in Figure 9. A start bit given by the mas-
ter, followed by the write address, starts the sequence.
The image sensor will then give an acknowledge bit
and expects the register address to come first, followed
by the 16-bit data. After each eight-bit the image sen-
16-Bit Read Sequence
the master has to write the register address, as in a
write sequence. Then a start bit and the read address
specifies that a read is about to happen from the regis-
ter. The master then clocks out the register data eight
09005aef80c6407f
MT9V011_external_DS_2.fm - Rev. A 8/04 EN
Figure 10: Timing Diagram Showing a Read from Reg0x09; Returned Value 0x0284
SDATA
SCLK
SDATA
A typical write sequence for writing 16 bits to a reg-
A typical read sequence is shown in Figure 10. First
Figure 9: Timing Diagram Showing a Write to Reg0x09 with the Value 0x0284
SCLK
ST ART
ST ART
0xBA ADDR
0xBA ADDR
ACK
ACK
Reg 0x09
Reg 0x09
ACK
ST ART
0xBB ADDR
ACK
13
1/4-INCH VGA CMOS ACTIVE-PIXEL
sor will give an acknowledge bit. All 16 bits must be
written before the register will be updated. After 16 bits
are transferred, the register address is automatically
incremented, so that the next 16 bits are written to the
next register. The master stops writing by sending a
start or stop bit.
bits at a time. The master sends an acknowledge bit
after each eight-bit transfer. The register address is
auto-incremented after every 16 bits is transferred.
The data transfer is stopped when the master sends a
no-acknowledge bit.
0000 0010
Micron Technology, Inc., reserves the right to change products or specifications without notice.
ACK
DIGITAL IMAGE SENSOR
0000 0010
ACK
ACK
1000 0100
1000 0100
©2004 Micron Technology, Inc.
Preliminary
ACK
NACK
STOP
STOP