* [U-Boot-Users] --- at91, Nand
@ 2008-04-28 11:32 Zhukov
2008-04-28 12:26 ` Andreas Schweigstill
0 siblings, 1 reply; 2+ messages in thread
From: Zhukov @ 2008-04-28 11:32 UTC (permalink / raw)
To: u-boot
In at91rm9200dk, for Nand support,
- can the pin PC7 be used instead of PC1 (the custom board made this
way)?
I change PC1 to PC7 within u-boot everywhere, it won't work:
I see SMWE strobe (pin PC3) drops down and never rises, the system
hangs...
Best regards,
Andrew
^ permalink raw reply [flat|nested] 2+ messages in thread
* [U-Boot-Users] --- at91, Nand
2008-04-28 11:32 [U-Boot-Users] --- at91, Nand Zhukov
@ 2008-04-28 12:26 ` Andreas Schweigstill
0 siblings, 0 replies; 2+ messages in thread
From: Andreas Schweigstill @ 2008-04-28 12:26 UTC (permalink / raw)
To: u-boot
Hello!
Zhukov schrieb:
> I change PC1 to PC7 within u-boot everywhere, it won't work:
> I see SMWE strobe (pin PC3) drops down and never rises, the system
> hangs...
Are you also using PC6 for any purpose? Do you (accidentally) configure
it as an output? Or do you either use it as an input or don't enable an
internal or external pull-up resistor?
You should check the signal level on PC6 in order to find out if you
hit erratum "NWAIT activity depend on use of PC6".
With best regards
Andreas Schweigstill
--
Dipl.-Phys. Andreas Schweigstill
Schweigstill IT | Embedded Systems
Schauenburgerstra?e 116, D-24118 Kiel, Germany
Phone: (+49) 431 5606-435, Fax: (+49) 431 5606-436
Mobile: (+49) 171 6921973, Web: http://www.schweigstill.de/
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2008-04-28 11:32 [U-Boot-Users] --- at91, Nand Zhukov
2008-04-28 12:26 ` Andreas Schweigstill
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