Application note by Mike Crean
Also at the bottom of this note, an AVR ISP programmer PCB layout from Pedro Silva
I have made a PCB for the simple SPI programmer found in the Bascom AVR help file. It uses a DB25 pin male plug to connect to a PC or Lap Top parallel port. It uses a cable with two pin and four pin plugs to connect to my AVR projects, these plugs are the same type used on the Hotchip cable.
NOTE : The pin outs to the two plugs are NOT THE SAME AS the HOTCHIP pin outs.
The programmer uses the STK200/STK300 Programmer option found in the Options - Programmer menu of Bascom AVR. I have successfully used the SPI programmer with Win95, 98, ME and 2000 pro. I have not used it with NT.
Programmer connected to AT90S8535-8PI eurocard master control board.
Connector pin outs
4-PIN PLUG
COLOUR
AVR-Pin
DESCRIPTION
1
Blue
6
MOSI
2
Yellow
7
MISO
3
Green
8
SCK
4
White
9
ReSet
2-PIN PLUG
COLOUR
AVR-Pin
DESCRIPTION
1
Red
10
+ 5 Volt
2
Black
11
- 5 Volt
I have used standard 6 core data cable for the lead, shield is connected to - at the SPI adaptor end only. I have run up to 5 meters of cable with out any problems.
Protel overlays for the simple SPI Programmer
Schematic for the SPI Programmer (from Bascom AVR PDF help files)
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