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CMV8000

Functional Description

Preliminary Datasheet

• PUBLIC

DS000609

• v1-00 • 2019-Jun-12

│ 51

Bit Name

Address

Description

row_length[6:0]

10-bit mode

12-bit mode

2: 16 outputs

4: 16 outputs

4: 8 outputs

8: 8 outputs

8: 4 outputs

16: 4 outputs

16: 2 outputs

32: 2 outputs

When multiplexing data to less than 16 output channels, the remaining LVDS channels are switched

off automatically. The following table details which channels remain active in the different multiplexing

modes.

Figure 57:

Active LVDS Channels

MUX

Active LVDS Channels

Pixels Per Channel

OUT1, OUT5, OUT0, OUT13, OUT17,

OUT21, OUT25, OUT29

224

OUT1, OUT9, OUT17, OUT25

448

OUT1, OUT17

896

7.6

Configuring the On-Chip Data Processing

7.6.1

Setting the Black Level

Figure 58:

Offset Register

Bit Name

Address

Description

db_offset_data[11:0]

80-81

Set the black level of the

sensor in 1DN increments

A digital offset can be applied to the output signal. This dark level offset can be programmed by setting

the desired value in the DB_OFFSET_DATA register. This 12-bit register value is a 2-complement

number, allowing addition and subtraction from the current black level, from +2047 to -2048. The ADC

itself has a fixed offset of -440DN.

To calculate the sensor black level, use the ADC offset and add or subtract the DB_OFFSET_DATA

value. For example, with the default value of this register at 444, the typical black level of the sensor

should be -440 + 444 = 4DN in 10-bit mode. For a register value greater than 2048, the value is

converted to a negative number like in Figure 59 below:

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