3.3.4.2.2 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 3-15. Legacy SPI Header Pinout
Table 3-6. SPI Pin Mapping
MPLAB PICkit 5 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 (MCLR)5RESET
79 (TDI)4MOSIHost Out Client In (Main Out Secondary In)
85 (TMS)