3.3.5.2.2 AVR SPI Pinout

For a legacy application PCB which includes an AVR with the SPI interface, the pinout as shown in the figure below may have been used.

Figure 3-10. Legacy SPI Header Pinout
Table 3-6. SPI Pin Mapping
MPLAB PICkit Basic PinAdapter Board AVR JTAG PinLegacy SPI PinNameDescription
17 or 8 (NC)
24 (VDD/VTG)2VCC/VTGTarget voltage (reference voltage)
32 or 10 (GND)6GNDGround
43 (TDO)1MISOHost In Client Out (Main In Secondary Out)
51 (TCK)3SCKSPI clock
66 (RESET/TAUX)5RESET
79 (TDI)4MOSIHost Out Client In (Main Out Secondary In)
85 (TMS)