Read-Out Timing; Free Running Mode - Photon Focus CameraLink MV1-D1312 series User Manual

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5.3 Read-out Timing

Sequential readout timing

By default, the camera is in free running mode and delivers images without any external

control signals. The sensor is operated in sequential readout mode, which means that the

sensor is read out after the exposure time. Then the sensor is reset, a new exposure starts and

the readout of the image information begins again. The data is output on the rising edge of

the pixel clock. The signals FRAME_VALID (FVAL) and LINE_VALID (LVAL) mask valid image

information. The signal SHUTTER indicates the active exposure period of the sensor and is shown

for clarity only.

P C L K

S H U T T E R

E x p o s u r e

T i m e

F V A L

L V A L

D V A L

D A T A

Figure 5.4: Timing diagram sequential readout mode

Simultaneous readout timing

To achieve highest possible frame rates, the camera must be set to "Free-running mode" with

simultaneous readout. The camera continuously delivers images as fast as possible. Exposure

time of the next image can start during the readout time of the current image. The data is

output on the rising edge of the pixel clock. The signals FRAME_VALID (FVAL) and LINE_VALID (LVAL)

mask valid image information. The signal SHUTTER indicates the active integration phase of the

sensor and is shown for clarity only.

5.3 Read-out Timing

F r a m e T i m e

C P R E

L i n e p a u s e

F i r s t L i n e

L i n e p a u s e

L a s t L i n e

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