Fire Bird V ATMEGA2560 Hardware Manual
** MOSI, MISO, SCK and SS pins of ATMEGA2560 are associated to the ISP (In System
programming) port as well as the SPI interface to ATMEGA8. J4 needs to be disconnected
before doing ISP. To communicate with ATMEGA8 jumper J4 needs to be in place. For more
details refer to section 3.19.6.
*** PORTB pin5, 6, 7 are OC1A, OC1B, OC1C of the Timer1. These pins are connected to the
servo motor sockets S1, S2, S3 on the microcontroller adapter board.
**** External Crystal of 32 KHz is connected to the pins PG3 and PG4 to generate clock for
RTC (Real Time Clock).
***** For using Analog IR proximity (1, 2, 3 and 4) sensors short the jumper J2. To use JTAG
or interface external analog sensors via expansion slot of the microcontroller socket remove
these jumpers.
****** AREF can be obtained from the 5V microcontroller or 5V analog reference generator IC
REF5050 (optional). For more details refer to section 3.19.9.
******* Sensor’s switching can be controlled only is if corresponding jumpers are open. For
more details refer to section 3.11 and 3.12.
******** External interrupt from the position encoder C1 is disabled by removing short on pad
P1 near CD40106 Schmitt trigger inverter buffer to avoid its wire ANDing with the interrupt
switch. Refer section 3.9 and 3.19.3 for details.
********* Refer the errata section for more details, where modification required for using PH4
port pin of microcontroller.
© NEX Robotics Pvt. Ltd. and ERTS Lab, CSE, IIT Bombay, INDIA 81