Pike
Technical
Manual
V5.2.3
93
Camera interfaces
Camera
interfaces
Pulse-width modulation
The
2
inputs
and
4
outputs
are
independent.
Each
output
has
pulse-width
modulation
(PWM)
capabilities,
which
can
be
used
(with
additional
external
electronics)
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
94):
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
feature
(read
only)
---
[1]
Reserved
---
[2
to
3]
Reserved
MinPeriod
[4
to
19]
Minimum
PWM
period
in
µs
(read
only)
---
[20
to
27] Reserved
---
[28
to
31] Reserved
0xF1000804
PulseWidth
[0
to
15]
PWM
pulse
width
in
µs
Period
[16
to
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
