Instructions

32Hardware

Clock Generation

Clock generation takes place by a 16MHz Quartz Oscillator. All time dependent actions within the

controller are derived from this clock frequency.

Reset

A Reset initiates the return of the Micro Controller system to a defined starting condition. In gerneral

the C-Control Pro Module knows two reset sources:

Power-On-Reset: is automatically executed after the operating voltage is switched on.

Hardware-Reset: is executed when the Module’s RESET (X2_3) is pulled to "low" and released

again by e. g. shortly pressing the connected Reset push button RESET1 (SW3).

A "Brown-Out-Detection" avoids that the Controller can enter undefined conditions in case of drop-

ping operating voltages.

Digital Ports (PortA, PortB, PortC, PortD, PortE, PortF, PortG)

The C-Control Pro Module provides 6 digital ports at 8 pins each and one digital port with 5 pins. To

the digital ports it is possible to connect e. g. push buttons with pull-up resistors, digital IC’s, opto

couples or driver circuits for relais. The ports can be addressed either separatly, i.e. pin by pin or

byte by byte. Each pin can either be input or output.

Note: Never connect two ports directly together which should simultaneously work as outputs!

Digital input pins are high-impedance or wired to internal pull-up resistors and transform an applied

voltage signal into a logical value. For this it is required that the voltage signal is within the limits

defined for TTL and CMOS ICs high or low levels. During further processing in the program the logical

values on the respective input ports are represented as 0 ("low") oder -1 ("high). Pins will take on the

values 0 or 1, Bytes from 0 to 255. Output ports are able to give out digital voltage signals by use of

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 pro-

grams 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