STV-5410-6500-E01 Ver la hoja de datos (PDF) - Vision

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STV-5410-6500-E01

Mono and Colour Digital Video CMOS Image Sensors

Vision 

VV5410 & VV6410

Timed Serial Interface Parameters

7. Timed Serial Interface Parameters

The previous section, Exposure Control, introduced the concept of a “timed parameter”, that is information that is written via the

serial interface but will not be used immediately by the sensor, rather there will be a delay before the information is passed to the

internal registers (referred to as the working registers) from the serial interface registers (referred to as the shadow registers). It is

the contents of the working registers that will determine sensor behaviour.

The architecture of VV5410/6410 requires that many of the programmable registers are handled in such a manner. This section

will identify all these registers, describe what they are all used for and then go on to explain when they are all updated.

7.1 Listing and Categorizing the Parameters

The timed parameters are split into 6 categories as follows:

• fine exposure

• coarse exposure

• clock division

• gain

• pan parameter

• tilt parameter

• video timing

There is a “pending” flag for each of the above categories. These flags are stored in Status0 Register[2]. If one of the flags is high

this indicates that the working register/s controlled by that flag have yet to be updated from the according shadow register/s. This

feedback information could be useful if a user is, for example, attempting to write an exposure controller. The status of the

pending flags allows accurate timing of the serial interface communications.

7.1.1 Fine Exposure

The fine exposure category simply comprises registers[32,33].

7.1.2 Coarse Exposure

The coarse exposure category simply comprises registers[34,35].

7.1.3 Clock Division

The clock division category simply comprises register[37].

7.1.4 Gain

The gain category simply comprises register[36].

7.1.5 Pan Parameter

The pan parameter category comprises the following registers:

• Setup0[16] (The “pan_pend” flag will only be set if the subsampled QCIF mode is entered or exited)

• Setup1[17] (The “pan_pend” flag will only be set if the hshuffle control bit is changing state)

• Data_format[22] (The “pan_pend” flag will only be set if the hmirror control bit is changing state)

• X-offset[87,88] (The “pan_pend” flag set unconditionally)

7.1.6 Tilt Parameter

The tilt parameter category comprises the following registers:

• Setup0[16] (The “tilt_pend” flag will only be set if the subsampled QCIF mode is entered or exited)

• data_format[22] (The “tilt_pend” flag will be set if the hshuffle control bit or the hmirror control bit is changing state)

• Y-offset[89,90] (The “tilt_pend” flag set unconditionally)

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