Instructions

62Hardware
© 2013 Conrad Electronic
Attention! A maximum current of 100mA through USB should not be exceeded!
The switch S3 and the power supply pin headers J17/J18 and the pins for Vcc / GND on the proto-
type area are no longer energized when using USB operation. This supply is used only for test ap-
plications, when there is no external power supply available.
The appropriate COM port (serial port) must be selected in the C-Control Pro IDE software. Also
the programming via USB is made through the serial interface of the C-Control "MEGA128 UNIT".
Prior to that check, when necessary, the Windows device manager, which COM ports are avail-
able, or which was installed by the RS232-USB converter.
If the I2C bus is used, the jumper JP2 and JP1 have to be inserted, if you provide no external pull-
up resistors by your own.
The bus unit is used to connect I2C-bus expansion modules of the CC1-family and can be used for
custom applications. The interface layout can be found in the figure.
The ports of the "MEGA128 UNIT" are passed out on headers J1, J2, J5, J6, J7, J14 and J15.
For more information on the exact characteristics of the ports, see the documentation/help file
in the C-Control Pro software.
Before you can transfer a program in the unit, the button (BOOT/STOP) must be pressed, to
switch the "MEGA128 UNIT" into programming mode.
When the voltage is supplied, the user program stored in the memory of the "MEGA128 UNIT" is
started automatically. This program can be stopped with the (BOOT/STOP) button. Then the
"MEGA128 UNIT" is in BOOT mode, which is required for program transmission.
The program start can be triggered via the IDE or on the button (RESET/START).
When using Msg_Write... to output variables, it is advisable to use the software start from the IDE.
Technical data
Operating voltage: 8 - 16V DC
Current consumption without load and without external RS232-USB converter: 50 mA