VV6501C001 STMicroelectronics, VV6501C001 Datasheet - Page 30

• Manufacturer Part Number: VV6501C001
• Description: IC SENSOR COLOR VGA CMOS 36CLCC
• Manufacturer: STMicroelectronics
• Type: CMOS Imagingr

Specifications of VV6501C001

• Pixel Size: 5.6µm x 5.6µm
• Active Pixel Array: 640H x 480V
• Frames Per Second: 30
• Voltage - Supply: 3V, 5V
• Package / Case: 36-CLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3883; VV6501C001

Serial Control Bus
4.3
4.3.1
4.3.2
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At the end of a sequence of incremental reads or writes, the terminal index value in the register will
be one greater than the last location read from or written to. A subsequent read will use this index to
begin retrieving data from the internal registers.
A message can only be terminated by the bus master, either by issuing a stop condition, a repeated
start condition or by a negative acknowledge after reading a complete byte during a read operation.
Types of messages
This section gives guidelines on the basic operations to read data from and write data to the serial
interface.
The serial interface supports variable length messages. A message may contain no data bytes, one
data byte or many data bytes. This data can be written to or read from common or different locations
within the sensor. The range of instructions available are detailed below.
Examples of these operations are given below. A full description of the internal registers is given in
the previous section. For all examples, the slave address used is 32
reading. The write address includes the read/write bit (the LSB) set to zero while this bit is set in the
read address.
Single location, single data write
When a random value is written to the sensor, the message looks as shown in
In this example, the fineH exposure register (index = 32
writing and the Inc. bit (MSB of the index byte) is set to zero to disable automatic increment of the
index after writing the value. The address index is preserved and may be used by a subsequent
read. The write message is terminated with a stop condition from the master.
Single location, single data read
A read message always contains the index used to get the first byte.
Write no data byte, only sets the index for a subsequent read message.
Multiple location write (using auto increment index bit) for fast information transfers.
Start
Start
S
S
address
address
Device
Device
21
20
h
h
Figure 25: Single location, single write
Figure 26: Single location, single read
Ack
Ack
A 0
A 0
Index
Index
32
32
h
h
A
A
10
) is set to 85
Data
Data
85
85
h
h
10
10
for writing and 33
. The r/w bit is set to zero for
A
A
Stop
Stop
P
P
Figure 25
10
.
VV6501
for