MT9P031I12STM-ES Aptina LLC, MT9P031I12STM-ES Datasheet - Page 19

• Manufacturer Part Number: MT9P031I12STM-ES
• Manufacturer: Aptina LLC

Specifications of MT9P031I12STM-ES

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Two-Wire Serial Interface Sample Write and Read Sequences
16-Bit WRITE Sequence
Figure 11:
16-Bit READ Sequence
Figure 12:
PDF: 09005aef81a4a477/Source: 09005aef81a4a495
MT9P031_DS - Rev. E 7/10 EN
S
SCLK
DATA
S
SCLK
DATA
START
START
0xBA ADDR
Timing Diagram Showing a WRITE to Reg0x09 with the Value 0x0284
Timing Diagram Showing a READ from Reg0x09; Returned Value 0x0284
0xBA ADDR
ACK
A typical WRITE sequence for writing 16 bits to a register is shown in Figure 11. A start bit
given by the master, followed by the write address, starts the sequence. The image sensor
then gives an acknowledge bit and expects the register address to come first, followed by
the 16-bit data. After each 8-bit transfer, the image sensor gives an acknowledge bit. All
16 bits must be written before the register is 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.
A typical READ sequence is shown in Figure 12. First the master has to write the register
address, as in a WRITE sequence. Then a start bit and the read address specify that a
READ is about to happen from the register. The master then clocks out the register data 8
bits at a time. The master sends an acknowledge bit after each 8-bit transfer. The register
address should be incremented after every 16 bits is transferred. The data transfer is
stopped when the master sends a no-acknowledge bit.
ACK
Reg0x09
Reg0x09
ACK
START
Two-Wire Serial Interface Sample Write and Read Sequences
0xBB ADDR
ACK
19
0000 0010
MT9P031: 1/2.5-Inch 5Mp Digital Image Sensor
ACK
0000 0010
ACK
Aptina reserves the right to change products or specifications without notice.
ACK
©2005 Aptina Imaging Corporation. All rights reserved.
1000 0100
1000 0100
ACK
NACK
STOP
STOP