mt9v032 aptina, mt9v032 Datasheet - Page 19

• Manufacturer Part Number: mt9v032
• Description: 1/3-inch Wide-vga Cmos Digital Image Sensor
• Manufacturer: aptina

Register Lock
Lock All Registers
Lock Read Mode Register Only (R0x0D)
PDF: 6538045704/Source:2194051501
MT9V022_DS - Rev. C 9/10 EN
Included in the MT9V032 is a register lock (R0xFE) feature that can be used as a solution
to reduce the probability of an inadvertent noise-triggered two-wire serial interface
write to the sensor. All registers (or read mode register—register 13 only) can be locked.
At power-up, the register lock defaults to a value of 0xBEEF, which implies that all
registers are unlocked and any two-wire serial interface writes to the register get
committed.
If a unique pattern (0xDEAD) to R0xFE is programmed, any subsequent two-wire serial
interface writes to registers (except R0xFE) are NOT committed. Alternatively, if the user
writes a 0xBEEF to the register lock register, all registers are unlocked and any
subsequent two-wire serial interface writes to the register are committed.
If a unique pattern (0xDEAF) to R0xFE is programmed, any subsequent two-wire serial
interface writes to register 13 are NOT committed. Alternatively, if the user writes a
0xBEEF to register lock register, register 13 is unlocked and any subsequent two-wire
serial interface writes to this register are committed.
Two-Wire Serial Interface Sample Read and Write Sequences
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MT9V032: 1/3-Inch Wide-VGA Digital Image Sensor
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©2005 Aptina Imaging Corporation. All rights reserved.