NEX ROBOTICS FIREBIRD V ATMEGA 2560 Hardware Manual page 37

Fire Bird V ATMEGA2560 Hardware Manual
* Position encoder of the motor C1 is connected to the INT7 pin of the ATMEGA2560
microcontroller via soldering pad P1. INT7 interrupt pin is also connected to bootloader switch
and TSOP1738 (via pad on microcontroller socket). If you want to use position encoder of C1,
then make sure that bootloader code is removed from the the ATMEGA2560 microcontroller
and soldering pad for TSOP1738 connection on the microcontroller socket is open. After these
two precautions are taken, solder pad P1 on the main board to connect C1 motor's position
encoder to the ATMEGA2560 microcontroller socket. This is very important. If not done then
because of pulse from C1 motor's position encoder, ATMEGA2560 microcontroller will go in to
boot mode. Figure 3.28 shows location of the pad P1 on the main board.
Figure 3.28: Pad P1 open and with short
© NEX Robotics Pvt. Ltd. and ERTS Lab, CSE, IIT Bombay, INDIA 37