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Mira130

Sensor Operation

Datasheet

• PUBLIC

DS000715

• v6-00 • 2023-Aug-09

│ 32

Sensor Operation

9.1

Illumination Trigger

Mira130 supports an illumination strobe feature and can be used to control a light source (LED or

VCSEL). During exposure, the LEDSTROBE pin outputs a logic level ‘high’ to enable an external

illumination.

Figure 36:

Illumination Strobe Control Register

Function

Address

Default Value

Description

Illumination strobe enable

16’h3361

8’h00

Bit[7:6]: LED strobe enable

2’b11: LED strobe disable

2’b00: LED strobe enable

9.2

External Triggering Mode

In external triggering mode, the exposure and data output of multiple sensors are synchronized by an

external triggering signal applied on the TRIGL pin. When the rising edge of the signal is detected, the

chip starts exposure after a short delay, and outputs data after completing exposure. The short delay

is determined by register 16’h3226, and the exposure time is determined by registers {16’h3e00[3:0],

16’h3e01,16’h3e02}. The frame rate is determined by the signal. Figure 37 shows the timing diagram

of external triggering mode which consists of the following time intervals: EXP Rows, Active Rows,

and Blank Rows.

Figure 37:

External Triggering Global Shutter Mode Timing Diagram

(1)

EXP Rows = {16’h3e00[3:0], 16’h3e01, 16’h3e02[7:4]} + 16’h3226, in the unit of line.

time

frame valid

TRIG

start exposure

end of frame N

start exposure

start of frame N

start of frame N+1

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