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BG0836 1/2.7 inch 1080P HD CMOS image sensor
PCB notice
Checklist
（TBD）
Register Slave Interface
I2C Slave Interface
Figure 6 Power-up Sequence
Chips have multiple sets of power supply, VDDD33/VDDIO/VDD are digital power
supply, VDDA33/VDDPIX are analog power supply. Analog power line need to pay
special attention that there must be no digital power and digital signal nearby to avoid
interference.
Power Line and ground line should as wide as possible, in general, the power line
wide should be more than 20MIL, if it is a very long power line，it`s width need to reach
30MIL ~40MIL. Try to use GND to isolate analog power line or copper. If the PCB is
multilayer, it's inner layer should have independent power layer and independent GND
layer, it is recommended to conduct a small range of copper for each power network,
and then lay GND on the free spare area of the power layer. The distance between
copper of Analog power and digital power must more than 20MIL, preferably use GND
to separate the two power, Analog power and digital power.
The ground net is generally made of copper. It helps to reduce crosstalk if copper
is spread over the TOP and BOTTOM layers. LDO or DC-DC should be placed far away
from the sensor to prevent the power chip from overheating. The MIPI clock line (CP/CN)
and the LVDS signal(D0P/D0N) should be differential pair lines and the differential
impedance is 100ohm. Their length should be same as possible, and the errors
between P & N should be less than 5MIL.
BG0836 is programmable through I2C interface with reading slave device address 0x65
and writing slave device address 0x64.The related IO pin is SCL and SDA. I2C interface
supports a 16-bit register address and 8-bit data message type.
Figure 7 I2C write operation shows example of the write operation (Writing 0x012C
register with 0x56 data). DSP is the master, BG0836 is the slave. The sequence is
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V1.2
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