Instruction manual

Guppy PRO Technical ManualV4.1.0

Camera interfaces

Pulse-width modulation

The 1 input and 3 outputs are independent. Each output has pulse-width modu-

lation (PWM) capabilities, which can be used (with additional external electron-

ics) for motorized speed control or autofocus control.

Period (in μs) and pulse width (in μs) are adjustable via the following registers

(see also examples in PWM: Examples in practice on page 75):

Note



The signals can be inverted.

Caution



Firing a new trigger while IntEna is still active can result in

missing image.

Note



•Note that trigger delay in fact delays the image capture

whereas the IntEna_Delay only delays the leading edge

of the IntEna output signal but does not delay the image

capture.

• As mentioned before, it is possible to set the outputs by

software. Doing so, the achievable maximum frequency is

strongly dependent on individual software capabilities.

As a rule of thumb, the camera itself will limit the toggle

frequency to not more than 700 Hz.

0xF1000800 IO_OUTP_PWM1 Presence_Inq [0] Indicates presence of this feature

(read only)

--- [1] Reserved

--- [2..3] Reserved

MinPeriod [4..19] Minimum PWM period in μs (read

only)

--- [20..27] Reserved

--- [28..31] Reserved

0xF1000804 PulseWidth [0..15] PWM pulse width in μs

Period [16..31] PWM period in μs

Table 32: PWM configuration registers