MT9V403 Micron, MT9V403 Datasheet - Page 14

• Manufacturer Part Number: MT9V403
• Description: 1/2-INCH VGA (WITH FREEZE-FRAME) CMOS ACTIVE-PIXEL DIGITAL IMAGE SENSOR
• Manufacturer: Micron

Two-Wire Serial Interface Sample Write and Read Sequences
Example of a 16-Bit Write Sequence
ister is shown in Figure 19. 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-
Example of a 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
09005aef80c07280
MT9V403_DS.fm - Rev. B 1/04 EN
Figure 20: Timing Diagram Showing a Read from Register 9; Returned Value is 642
SDATA
SDATA
A typical write sequence for writing 16 bits to a reg-
A typical read sequence is shown in Figure 20. First
SCLK
SCLK
Figure 19: Timing Diagram Showing a Write to Register 9 with the Value 644
START
START
B8b ADDR
B8h ADDR
ACK
ACK
Reg0x09
Reg0x09
1/2-INCH VGA (WITH FREEZE-FRAME) CMOS
ACK
ACTIVE-PIXEL DIGITAL IMAGE SENSOR
B9h ADDR
ACK
14
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 should be incre-
mented, 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
should be incremented after every 16 bits is trans-
ferred. 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
0000 0010
ACK
ACK
1000 0100
1000 0010
©2004 Micron Technology. Inc.
ACK
NACK
STOP
STOP