MSI JSPI1

From flashrom
Revision as of 01:40, 13 October 2020 by Dhendrix (talk | contribs)
Jump to navigation Jump to search

This wiki is retired

Our website is https://www.flashrom.org, instructions on how to add or update documentation are here

All wiki content available in read-only mode at wiki.flashrom.org

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.

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)