VV5300 View Datasheet(PDF) - Vision

Part Name

Description

View to exact match

VV5300

Integrated CMOS Image Sensor with on-chip ADC.(Sensor)

Vision 

VV5300 Sensor

Auto Black Calibration

Black calibration is used to remove voltage offsets that cause shifts in the black level of the video signal.

VV5300 is equipped with an automatic function that continually monitors the output black level and calibrates

if it has moved out of range. Black calibration can be split into two stages, monitor (1 cycle) and update (3

cycles). During the monitor phase the current black level is compared against two threshold values. If the

current value falls outside the threshold window then an update cycle is triggered. The update cycle can also

be triggered by a change in the gain applied to sensor core or via the serial interface.

Serial Interface

In order to be controlled and configured by its host, VV5300 can receive and transmit data via a two-wire

serial interface.

Serial Communication Protocol

The host must perform the role of a communications master and the camera acts as either a slave receiver

or transmitter.The communication from host to camera takes the form of 8-bit data with a maximum serial

clock frequency of up to 100kHz. Since the serial clock is generated by the host it determines the data

transfer rate. The bus address for VV5300 is 20H. Data transfer protocol on the bus is shown below.

Start condition

Read/Write bit Acknowledge from receiver

SDA

SCL

S

MSB

12

7 8 9 1 2 3-8 9

P

ACK

ACK

Stop condition

Data Transfer Protocol

Data format

A message contains at least two bytes preceded by a start condition and followed by either a stop or repeated

start followed by another message.

The first byte contains the device address byte which includes the data direction read/write bit. The device

address is 3210 Write, 3310 Read. The 5 msbs of the address byte are fixed as 0010_02. The lsb of the

address byte indicates the direction of the message. An even address causes the addressed slave to receive

information from the master (write), an odd address indicates message read by the master.

Sensor acknowledges valid address

Acknowledge from slave

S address[7:1]

[0] A INC INDEX[6:0]

A DATA[7:0]

A

0010000

R/W bit

DATA[7:0]

AP

Data Format

After the read/write bit is sampled, the data direction cannot be changed, until the read/write bit next message

is received. The next byte contains the location of the first data byte (also referred to as the index).There may

be up to 128 such locations. If the msb of the second byte is set the automatic increment feature of the

address index is selected.

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