MSI JSPI1
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JSPI1 is a 5×2 or 6x2 2.0mm pitch pin header on many MSI motherboards. It is used to recover from bad boot ROM images. Specifically, it appears to be used to connect an alternate ROM with a working image. Pull the #HOLD line low to deselect the onboard SPI ROM, allowing another SPI ROM to take its place on the bus. Pull the #WP line high to disable write-protection.
| name | pin | pin | name |
|---|---|---|---|
| 3VSB | 1 | 2 | 3VSB |
| MISO | 3 | 4 | MOSI |
| #SS | 5 | 6 | SCLK |
| GND | 7 | 8 | GND |
| #HOLD | 9 | 10 | NC |
| name | pin | pin | name |
|---|---|---|---|
| #HOLD | 1 | 2 | #WP |
| NC | 3 | 4 | NC |
| NC | 5 | 6 | GND |
| CLK | 7 | 8 | #SS |
| SI | 9 | 10 | SO |
| NC | 11 | 12 | 3VSB |
| name | function |
|---|---|
| 3VSB | standby 3.3V |
| MISO | SPI Master In/Slave Out |
| MOSI | SPI Master Out/Slave In |
| #SS | SPI Slave (Chip) Select (active low) |
| SCLK | SPI Clock |
| GND | ground/common |
| #HOLD | SPI hold (active low) |
| #WP | SPI write-protect (active low) |
| NC | Not Connected (or no pin) |