XGS datasheet(24/53 Pages) ONSEMI

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XGS Family

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SLAVE MODE (TRIGGERED)

Figure 19. Slave Mode (Triggered)

The slave mode depicted in Figure 19 adds more manual

control to the sensor. The integration time registers

(frame_length and integration) are ignored in this mode and

the integration time is rather controlled by an external pin.

As soon as the control pin is asserted, the Sequencer

schedules the SFOT operations. The integration continues

until the external pin is deasserted by the user/system. Now,

the image is sampled and the readout is initiated.

Figure 20. Integration Control in Slave Mode (Triggered)

The latency between the trigger events and the

SFOT/EFOT operations respectively is fixed and

predictable. The latency between a trigger assertion and the

SFOT

operation

controlled

through

integration_offset_coarse.

NOTES:

• The trigger is an asynchronous signal which is

synchronized in the Sequencer. As a consequence,

synchronization jitter can be observed.

• The response time between a TRIG_INT event and the

start/end of integration shall be constant, besides the

synchronization uncertainty and jitter.

• Changes in registers such as gain and integration_offset

can be configured to take effect in the same frame (when

uploaded before the raising edge of the trigger signal) or

in the next frame (N+1 with readout in N+2) when either

gain_lat_comp or offset_lat_comp is enabled. By default,

these registers are enabled in R0x3802 and gain will take

effect in the exposure of frame N+1.

• The following registers are not used in this mode and

do not have any influence (implicitly defined by the

trigger):

♦ integration_coarse,

♦ integration_fine,

♦ frame_length

Minimum integration time limitations are listed in

Table 10 below.

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