The ISP/SPI Header is not mounted by default on the board. It is open for the user to mount manually. A standard 6-pin 2.54 mm pitch header is needed for mounting. The header can be used as a standard ISP/SPI extension for other modules/boards. The pin definition is shown in the table below.
| Pin | Port on ATtiny817 | Name |
|---|---|---|
| 1 | PC1 | SPI_MISO |
| 2 | VCC | VCC |
| 3 | PC0 | SPI_SCK |
| 4 | PC2 | SPI_MOSI |
| 5 | PC5 | RST_BUTT |
| 6 | GND | GND |
Figure 1. The ISP/SPI Header
Figure 2. Schematic of the ISP/SPI
Header
