Conrad C-Control Pro Mega Series, Руководство пользователя

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36 Hardware
© 2008 Conrad Electronic
an internal driver circuit. Connected circuits can draw (at high level) or feed (at low level) a specific
current from or to the ports
Pay attention to the Maximum Admissible Load Current for a single port or for all ports in total.
Exceeding the maximal values may lead to destruction of the C-Control Pro Module. After a reset
each port is initially configured as input port. By certain commands the direction of data transport
can be toggled.
It is important to closely study the pin assignment of M32 and M128 prior to programming since
important functions of the program design (e. g. the USB interface of the application board) will apply
to specific ports. If these ports are re-programmed or if the matching jumpers on the application
board are no longer set then it may happen that the design platform can no longer transfer any
programs to the C-Control Pro. Timer inputs and outputs, A/D converter, I2C as well as serial
interface are also connected to various port pins.
PLM Ports
There are three timers available for PLM. These are Timer_0 with 8 bits and Timer_1 as well as
Timer_3 with 16 bits each. 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, Timer_1 and Timer_3 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 admissible ambient temperature 0°C … 70°C
Range of admissible relative ambient humidity 20% … 60%
Power Supply
Range of admissible operating voltage 4.5V … 5.5V
Power consumption of the module without
external loads appr. 20mA