Datasheet

10
BIG AVR 6 Development System
MikroElektronika
page
AVR microcontrollers are programmed using SPI serial communication which employs the following microcontroller pins MISO, MOSI
and SCK.
During the programming, the multiplexer disconnects
the microcontroller pins used for programming
from the rest of the board and connects them to
the AVRprog programmer. When the process
of programming is complete, these pins are
automatically disconnected from the programmer
and may be used as input/output pins.
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In addition to the on-board programmer, the BIGAVR6 development system may also use an external programmer AVR ISP from Atmel
for programming microcontrollers. It is linked to the connector AVR ISP. Prior to connecting and using the external programmer, it is
necessary to place jumper J21 in the EXTERNAL position. Then you should use jumper J22 to select the appropriate microcontroller
socket.
)LJXUHAVR ISP programmer’s connector
)LJXUHAVRISP mkII linked to the board
Jumper J21 set to the EXTERNAL position
enables the operation of the external programmer
AVRISP
Jumper J21 set to the ON-BOARD position enables
the operation of the on-board programmer
The position of jumper J22 when the external
programmer is used for programming microcontrollers
in 100-pin TQFP package
The position of jumper J22 when the external
programmer is used for programming microcontrollers
in 64-pin TQFP package
Jumpers for selecting pins to be
fed with programming signal
)LJXUHThe principle of programmer’s operation