B450M Pro4-F, SPI flash header J1

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   Hello, I've recently got a new B450M Pro4-F board with Ryzen 3600. I'm planning to upgrade to more powerful ryzen in the future and eventually to install coreboot when it gets Ryzen support. 

Because of this I will probably need to reflash BIOS often. I've found there is SPI flash chip related header "J1" on the board (9 pin, next to the chip). Can I get pinout of this header? I was able to measure 8 pins which go straight to the chip, but there is 1 more, which seems to be connected to ground via 17 ohm resistance. Is this pin necessary for the operation? 

J1 header location

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
pc2005 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 27 May 2021 Status: Offline Points: 20	Post Options Post Reply Quote pc2005 Report Post Thanks(0) Quote Reply Topic: B450M Pro4-F, SPI flash header J1 Posted: 27 May 2021 at 6:37pm
	Hello, I've recently got a new B450M Pro4-F board with Ryzen 3600. I'm planning to upgrade to more powerful ryzen in the future and eventually to install coreboot when it gets Ryzen support. Because of this I will probably need to reflash BIOS often. I've found there is SPI flash chip related header "J1" on the board (9 pin, next to the chip). Can I get pinout of this header? I was able to measure 8 pins which go straight to the chip, but there is 1 more, which seems to be connected to ground via 17 ohm resistance. Is this pin necessary for the operation? J1 header location