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Camera interfaces
GUPPY Getting Started V4.0.1
104
PWM: minimal and maximal periods and frequencies
In the following formulas you find the minimal/maximal periods and frequen-
cies for the pulse-width modulation (PWM).
Register Name Field Bit Description
0xF1000800 IO_OUTP_PWM1 Presence_Inq [0] Indicates presence of this fea-
ture (read only)
TimebaseCapable [1]
[2..3] -
MinPeriod [4..19] Minimum PWM period in µs
[20..27] -
TimeBase [28..31]
0xF1000804 PulseWidth [0..15] PWM pulse width in µs
Period [16..31] PWM period in µs
0xF1000808 IO_OUTP_PWM2 Same as PWM 1
control
0xF100080C IO_OUTP_PWM3 Same as
Puls
Period
... IO_OUTP_PWM4 Same as PWM 1
control
Table 35: PWM configuration registers
Formula 1: Minimal/maximal period and frequency
period
min
3µs
=
frequency
max
1
period
min
-----------------------
1
3µs
--------
333.33kHz
= = =
⇒
frequency
min
1
2
16 6
–
×
10
s
-------------------------
15.26Hz
= =
period
max
1
frequency
min
-------------------------------
2
16
µs
= =
⇒