CMV300 datasheet(31/56 Pages) AMSOSRAM

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Reference:CMV300-datasheet-v2.11

CMV300 Datasheet

Page 29 of 54

Saturation

level

Kneepoint 1

Kneepoint 2

# of electrons

FIGURE 33: PIECEWISE LINEAR RESPONSE

When using the PLR mode, the CDS for the second and third slope is not available anymore, increasing the FPN for

these slopes. Also the noise will become higher in this mode.

5.2.2.1 PIECEWISE LINEAR RESPONSE WITH INTERNAL EXPOSURE MODE

The following registers need to be programmed when a piecewise linear response in internal exposure mode is desired.

HDR settings – PLR

Default value

Description of the value

Exp_time

42-44

488

The value in this register defines the total exposure time

according following formula: Exp_time x 325 x clk_per,

where clk_per is the period of the master input clock.

Nr_slopes

54[1:0]

The value in this register defines the number of slopes

(min=1, max=3).

Exp_kp1

48-50

The value in this register defines the exposure time from

kneepoint 1 to the end of the total exposure time.

Formula: Exp_kp1 x 325 x clk_per, where clk_per is the

period of the master input clock.

Exp_kp2

51-53

The value in this register defines the exposure time from

kneepoint 2 to the end of the total exposure time.

Formula: Exp_kp2 x 325 x clk_per, where clk_per is the

period of the master input clock.

Vtfl2

113[6:0]

The value in this register defines the Vtfl2 voltage (DAC

setting) of kneepoint 1.

Bit[6] = enable (=1)

Bit[5:0] = value (0-63)

Vtfl3

114[6:0]

The value in this register defines the Vtfl3 voltage (DAC

setting) of kneepoint 2.

Bit[6] = enable (=1)

Bit[5:0] = value (0-63)

5.2.2.2 PIECEWISE LINEAR RESPONSE WITH EXTERNAL EXPOSURE MODE

When external exposure time is used and a piecewise linear response is desired, the following registers should be

programmed.

HDR settings – PLR

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