3.6 Strapping Pin Header
The J103 is the strap 1 header; by default, this is pulled low (with the help of jumper position in between pin 2 and pin 3). This configuration enables the SDIO host interface selection.
For the SPI host interface selection, the jumper position must be in between pin 1 and pin 2 of J103 header.
The following table describes the host interface selection based on the jumper selection
of the J103 header.
| Host Interface Selection | J103 (Strap 1) Header |
|---|---|
| SDIO (Default) | 0 |
| SPI | 1 |
Note: The J104 strap 2 pin header is reserved and, by default, pulled high with
the jumper position in between pin 1 and pin 2 on the J104 header.