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CSG14K_CSG8K

Functional Description

Datasheet

• PUBLIC

DS000571

• v1-00 • 2020-Dec-15

112

│ 85

maximal valid image width is 3856 columns, a complete row is transferred in 482 word cycles when

utilizing all outputs.

Reduced Number of Data Channels

In many applications, it is not mandatory to use all data channels (for example when reading a limited

horizontal ROI or when operating the sensor below its nominal frame rate). In these cases, it could be

interesting to use less data channels to save power consumption.

The number of DATAx_OUT channels used per side is programmable with the NR_OUTP register.

Figure 104:

Number of Outputs Registers

Reg. Name

Bank

Addr

Bits

Description

NR_OUTP

[3:0]

Number of DATAx_OUT channels to be used (per side)

MAX_NR_OUTP

[3:0]

Upper limit to number of channels to be used, in case of

context switching (per side)

DATA_CH_EN_DRIVE

[0:0]

‘0’: Disable channel driver

‘1’: Enable channel driver

The first N channels starting at DATA0_OUT are used (per side).

For example, when setting NR_OUTP to 4, DATA0_OUT to DATA3_OUT channels are used on both

top and bottom side, totaling 8 outputs. DATA4_OUT to DATA7_OUT are disabled on both sides.

All unused DATAx_OUT channels are automatically disabled, but not necessarily powered-down. To

allow on-the-fly context switching to a context with a different setting of NR_OUTP, the register

MAX_NR_OUTP must be set to the maximum setting of NR_OUTP over the different contexts.

MAX_NR_OUTP defines the number of output channels that will be powered-on. Channels above

MAX_NR_OUTP are automatically powered-down. Channels between NR_OUTP and

MAX_NR_OUTP must be individually powered-down using DATA_CH_EN_DRIVE.

The number of columns read on every output or kernel size is defined by these registers.

Figure 105:

Kernel Size Registers

Reg. Name

Bank

Addr

Bits

Description

KSIZE

23-24

[13:0]

Number of columns read per output

Every channel sends an equal amount of pixels per row defined by KSIZE. The last (or rightmost)

channel of the used DATAx_OUT channels pads dummy pixels after the valid pixels when needed.

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