mt9v112 Micron Semiconductor Products, mt9v112 Datasheet - Page 55

• Manufacturer Part Number: mt9v112
• Description: 1/6-inch Soc Vga Cmos Digital Image Sensor
• Manufacturer: Micron Semiconductor Products

8-Bit Write Sequence
a special register address is added. The 8-bit write is
started by writing the upper 8 bits to the desired regis-
ter, then writing the lower 8 bits to the special register
8-Bit READ Sequence
address is used for the lower byte. The upper 8 bits are
read from the desired register. By following this with a
09005aef8154a39d/09005aef8175e6cc
MT9V112_2.fm- Rev. A 1/05 EN
S
SCLK
DATA
To be able to write one byte at a time to the register,
To read one byte at a time, the same special register
S
S
• •
SCLK
DATA
SCLK
DATA
Start
0xBA Address
Figure 18: READ Timing from R0x09:0; Returned Value 0x0284
Start
Start
0xBA Address
0xBA Address
Figure 17: WRITE Timing to R0x09:0—Value 0x0284
ACK
Reg0x09
ACK
ACK
ACK
Reg0x09
Reg0xF1
0000 0010
ACK
ACK
ACK
55
Start
Start
SOC VGA DIGITAL IMAGE SENSOR
Start
address (R0xF1:0). The register is not updated until all
16 bits have been written. It is not possible to update
just half of a register. In Figure 17, a typical sequence
for an 8-bit WRITE is shown. The second byte is writ-
ten to the special register (R0xF1:0).
read from the special register (R0xF1:0), the lower 8
bits are accessed (Figure 18). The master sets the no-
acknowledge bits.
0xBA Address
0xBB Address
0xBB Address
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ACK
ACK
ACK
Reg0xF1
0000 0010
1000 0100
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ACK
1000 0100
PRELIMINARY
NACK
NACK
MT9V112
Stop
• •
ACK
Stop