CHR71000 datasheet(27/54 Pages) AMSOSRAM

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CHR71000

Functional description

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If the integration time (in number of lines) is longer than the number of lines in a frame, the

start of a frame is delayed until the integration time has finished. Figure 15 shows the timing of

reading out 2 frames of 2 lines, with an integration time of 4 line times.

Figure 15: Example of readout of 2 frames (2 lines) with 4 lines integration time

7.3.2.1

Using external timing

The frame timing (integration and row readout) is controlled with the signals CLK_Y,

SYNC_Y_READ and SYNC_Y_INTE. A new line time starts at every rising edge on CLK_Y. A

line time can have three functions. The function of a line is defined by the state of

SYNC_Y_READ and SYNC_Y_INTE at the time of the rising edge on CLK_Y. The three

functions of a line can be:

Table 8: Line functions

SYNC_Y_READ

SYNC_Y_INTE

Function

First line of a frame read-out

Integration

Reset. A line is in reset if it is not integrating or being read-out.

Illegal

As an example, the figure showing the timing of reading out 2 frames of 4 lines with an

integration time of 2 lines is repeated, but with the timing of the three input pulses, like shown

on Figure 16.

INTE 1

INTE 2

ROT 1

ROT 2

Frame 1 Integration

Frame 1 Readout

ROT 1

ROT 2

Frame 2 Readout

Frame 2 Integration

INTE 3

INTE 4

INTE 1

INTE 2

INTE 3

INTE 4

INTE 1

INTE 2

INTE 3

INTE 4

INTE 1

INTE 2

INTE 3

INTE 4

ROW 1

ROW 2

ROW 1

ROW 2

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