Bootloading Atmega8A-AU

Using Arduino Avrdude, stk500, Bootloader issues
1

Hi,
i designed a pcb for Atmega328p-AU but due to some logistical issues i was forced to use Atmega8a-AU, but the problem is that i am not able to burn a bootloader. I tried using MiniCore and Arduino NG or Older but no luck. This the message i am getting. I assembled pair of two boards one with 16MHz crystal and associated caps and one without. Neither of them works.
I also checked with AVRDUDEs using USBasp and the detect option is not returning anything. The pcb is a a working one because i am using it with Atmega328p-au.

"avrdude: Version 6.3-20190619
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch

     System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"

     Using Port                    : COM7
     Using Programmer              : stk500v1
     Overriding Baud Rate          : 19200
     AVR Part                      : ATmega8
     Chip Erase delay              : 10000 us
     PAGEL                         : PD7
     BS2                           : PC2
     RESET disposition             : dedicated
     RETRY pulse                   : SCK
     serial program mode           : yes
     parallel program mode         : yes
     Timeout                       : 200
     StabDelay                     : 100
     CmdexeDelay                   : 25
     SyncLoops                     : 32
     ByteDelay                     : 0
     PollIndex                     : 3
     PollValue                     : 0x53
     Memory Detail                 :

                              Block Poll               Page                       Polled
       Memory Type Mode Delay Size  Indx Paged  Size   Size #Pages MinW  MaxW   ReadBack
       ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
       eeprom         4    20   128    0 no        512    4      0  9000  9000 0xff 0xff
       flash         33    10    64    0 yes      8192   64    128  4500  4500 0xff 0x00
       lfuse          0     0     0    0 no          1    0      0  2000  2000 0x00 0x00
       hfuse          0     0     0    0 no          1    0      0  2000  2000 0x00 0x00
       lock           0     0     0    0 no          1    0      0  2000  2000 0x00 0x00
       calibration    0     0     0    0 no          4    0      0     0     0 0x00 0x00
       signature      0     0     0    0 no          3    0      0     0     0 0x00 0x00

     Programmer Type : STK500
     Description     : Atmel STK500 Version 1.x firmware
     Hardware Version: 2
     Firmware Version: 1.18
     Topcard         : Unknown
     Vtarget         : 0.0 V
     Varef           : 0.0 V
     Oscillator      : Off
     SCK period      : 0.1 us

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.02s

avrdude: Device signature = 0xffffff (probably .reduced_core_tiny) (retrying)

Error while burning bootloader.
Reading | ################################################## | 100% 0.02s

avrdude: Device signature = 0x00ffff
avrdude: Expected signature for ATmega8 is 1E 93 07
Double check chip, or use -F to override this check.

avrdude done. Thank you."

2

Let's see it, please. Schematics and a picture of the finished product. It will be much easier to help then.

3

Why ATmega8? It is old and quite different from ATmega328. If possible is better to use ATmega88, which is similar to 328.

4

Screenshot (77)
Screenshot (77)1920×1080 217 KB

This is the schematic.

5

yes, my local supplier only had Atmega8 in stock and i have to deliver the product asap.

6

Excellent. Can you please provide a picture as well?
Design and implementation can sometimes vary.

7

WS2812_Stairs_Back
WS2812_Stairs_Back1918×960 52.2 KB

WS2812_Stairs_Front
WS2812_Stairs_Front1918×960 41.3 KB

These are the pics. The connections are correct. The atmega328p-au version of the board is working.

8

If the Atmega8 is brand new, it's running off it's internal 1MHz oscillator. This is a bit too slow for a USBasp programmer. Does it work if you use the "USBasp (slow)" option with MiniCore?

9

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