User Manual

Camera interfaces
PIKE Technical Manual V5.1.2
125
Pulse-width modulation
The 2 inputs and 4 outputs are independent. Each output has pulse-width mod-
ulation (PWM) capabilities, which can be used (with additional external elec-
tronics) 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 Chapter PWM: Examples in practice on page 127):
To enable the PWM feature select output mode 0x09. Control the signal state via
the PulseWidth and Period fields (all times in microseconds (μs)).
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.
Register Name Field Bit Description
0xF1000800 IO_OUTP_PWM1 Presence_Inq [0] Indicates presence of this fea-
ture (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
0xF1000808 IO_OUTP_PWM2 Same as
IO_OUTP_PWM1
0xF100080C
0xF1000810 IO_OUTP_PWM3 Same as
IO_OUTP_PWM1
0xF1000814
0xF1000818 IO_OUTP_PWM4 Same as
IO_OUTP_PWM1
0xF100081C
Table 33: PWM configuration registers