Difference between revisions of "MSI JSPI1"

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JSPI1 is a 5×2 or 6x2 2.0mm pitch pin header on many MSI motherboards.
JSPI1 is a 5x2 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.
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.



Revision as of 03:05, 13 October 2020

JSPI1 is a 5x2 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.

JSPI1 (5x2)
name pin pin name
3VSB 1 2 3VSB
MISO 3 4 MOSI
#SS 5 6 SCLK
GND 7 8 GND
#HOLD 9 10 NC
JSPI1 (6x2)
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)