Does the program you are booting access the flash in any way? All I can think is your program sets the flash into a different mode which the xcore cannot then boot from.
The reset switch resets the xcore but does not reset the flash.
Joe
Changing Flash IC on Explorer Kit boards
-
JoeVerified
- Experienced Member
- Posts: 122
- Joined: Sun Dec 13, 2009 1:12 am
XMOS hardware grey beard.
-
alwalker
- Experienced Member
- Posts: 103
- Joined: Sun Apr 08, 2018 11:19 pm
Hi Joe,
The issue appears to be that there is no output from pin 4 of U9 (ADM1085)when the reset switch is pressed when probing on test point TP21 (signal name POR). The low-going reset level from the switch is ok going into pin 1 of U9. Even with the level of magnification in the photo, it's still difficult to see clearly, but it looks like pin 6 of U9 is damaged. Given the fine pitch of the package and my eyesight not being as good as it was, I'll see if I can persuade someone to change it, however as the ENOUT output of the ADM1085 is open-drain, I'm wondering whether a pragmatic solution is a jumper wire from R47 to R45?
Kind regards,
Al
The issue appears to be that there is no output from pin 4 of U9 (ADM1085)when the reset switch is pressed when probing on test point TP21 (signal name POR). The low-going reset level from the switch is ok going into pin 1 of U9. Even with the level of magnification in the photo, it's still difficult to see clearly, but it looks like pin 6 of U9 is damaged. Given the fine pitch of the package and my eyesight not being as good as it was, I'll see if I can persuade someone to change it, however as the ENOUT output of the ADM1085 is open-drain, I'm wondering whether a pragmatic solution is a jumper wire from R47 to R45?
Kind regards,
Al
You do not have the required permissions to view the files attached to this post.
-
alwalker
- Experienced Member
- Posts: 103
- Joined: Sun Apr 08, 2018 11:19 pm
Yes, fitting a new ADM1085 IC fixed the reset issue.
Kind regards,
Al
Kind regards,
Al