I'm learning to program an atmega328p using a usbasp programmer. I'm using this datasheet, page 2, PDIP pin configuration. The usbasp programmer I'm using is this. The armega328p chip I am using is one of these.

My program:

#include <avr/io.h>
#include <util/delay.h>

int main(void)
    DDRB = 0b00000001;

    for (;;) {
        PORTB = 0b00000001;
        PORTB = 0b00000000;

    return 0;

which I compiled by doing:

avr-gcc -std=gnu99 -Os -Wall -mmcu=atmega328p -DF_CPU=1000000UL main.c -o main.elf
avr-objcopy -O ihex -j .text -j .data main.elf main.hex

Then tried to upload using:

avrdude -p atmega328p -c usbasp -P usb -D -U flash:w:main.hex:i

which results in

avrdude error: program enable: target does not answer (0x01)
avrdude error: initialization failed, rc=-1
        - double check the connections and try again
        - use -B to set lower the bit clock frequency, e.g. -B 125kHz
        - use -F to override this check

My connections are:

enter image description here

My breadboard looks like:

enter image description here

  • \$\begingroup\$ It's hard to see, but it looks like RESET and SCK are connected the wrong way. \$\endgroup\$
    – MiNiMe
    Oct 27, 2023 at 2:45
  • \$\begingroup\$ The brown (RESET) wire is next to the blue one (with a gap between), the white wire which is SCK, is between the orange and the brown. Orange is the connected to the very last socket. \$\endgroup\$
    – kovac
    Oct 27, 2023 at 2:51
  • \$\begingroup\$ Then perhaps this is what's messing it up: Atmega328p Microcontroller with Uno R3 Bootloader || Isn't that bootloader preset for external 16 MHz oscillator? \$\endgroup\$
    – MiNiMe
    Oct 27, 2023 at 3:03
  • \$\begingroup\$ Oh... if this is the case do I need an external oscillator to do anything with it? Or can I remove the bootloader and perhaps burn a different one? \$\endgroup\$
    – kovac
    Oct 27, 2023 at 3:17
  • \$\begingroup\$ The chip will use the external clock that is 0 MHz, so you have a moment 22. You need an external oscillator circuit for this. One simple solution is using an Uno with socketed 328p, so you can swap in this chip. \$\endgroup\$
    – MiNiMe
    Oct 27, 2023 at 3:22

1 Answer 1


From following the link you provided it gives that the MCU comes with a bootloader for the Uno R3. That means a 16 MHz external oscillator is set and must be used in order to use the MCU.


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