AVR programming adapter for parallel port "STK2000" DEBUG the debug connector (2x5 pin) AVR the AVR microprocessor (ATMEGA128) PP the parallel port (DB25) AVR.PDI (2) --- DEBUG.PDI (1) --- PP.D5 (7) AVR.PDO (3) --- DEBUG.PDO (9) --- PP.nACK (10) AVR.SCK (11) --- DEBUG.SCK (7) --- PP.D4 (6) AVR.nRESET (20) --- DEBUG.nRESET (5) --- PP.D7 (9) AVR.VCC (21, 52, 64) --- DEBUG.VCC (2, 3) AVR.GND (22, 53, 63) --- DEBUG.GND (4,6,8,10) --- PP.GND (18..25) PP.D0 (2) --- PP.PPROUT (12) PP.D1 (3) -- PP.!BUSY (11)