MSI JSPI1
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JSPI1 is a 5×2 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.
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 | 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) |
NC | Not Connected (no pin) |