User guide

TH7887A

2146A–IMAGE–05/02

Timing Diagram The following diagrams are given for:

• 20 MHz readout frequency

• 1.25 MHz vertical transfer frequency

Readout of one image is performed in 2 steps:

• image zone to memory zone transfer

• memory zone to register transfer and readout of register

This last step is also an integration period, the duration of which can also be increased

according to the required frame rates.

Figure 5. Frame Timing Diagram

Image to memory zone

Transfer

Picture readout

Integration period

1044

See fig. 7

See fig. 6

=Φ M

1044 pulses

1044

Memory zone

Cleaning period (*)

(*) During the cleaning period, memory clocks must be pulsed as during readout time

(specially for high temperature applications).

Φ M1

Φ M2

Φ M3

Φ M4

Φ L1

Φ L2

Φ R

Φ A

Φ P2

Φ P3

Φ P4