Conrad C-Control Pro Mega Series Manual page 29

PLM-Ports
There are two timers available for PLM. These are Timer_0 with 8 bits and Timer_1 with 16 bits.
They can be used for D/A conversion, to control servo motors in pattern making and to output audio
frequencies. A pulse length modulated signal has a period of N so called "Ticks". The duration of one
tick is the time base. If the output value of a PLM port is set to X then the port will hold high level for
X ticks of one period and will then for the balance of the period drop to low level. For programming of
the PLM channels see Timer.
The PLM channels for Timer_0 and Timer_1 have independent time base and period length. In
applications for pulse width modulated digital to analog conversion the time base and period length
are set once and then only the output value is varied. According to their electrical properties the PLM
ports are digital ports. Please observe the technical boundary conditions for digital ports (max.
current).
Technical Data Module
Note: Detailed information can be found in the IC manufacturer's PDF files on the C-Control Pro
Software CD-ROM.
All voltage specifications apply to direct current (DC).
Environmental Conditions
Range of admissable ambient temperature
Range of admissable ambient relative humidity
Power Supply
Range of admissable supply voltage
Power reqirement of the module without external
loads
© 2008 Conrad Electronic
Hardware
0°C ... 70°C
20% ... 60%
4,5V ... 5,5V
appr. 20mA
20