* [U-Boot] NAND on eLBC
@ 2010-11-05 9:21 Andre Schwarz
2010-11-09 19:36 ` Scott Wood
0 siblings, 1 reply; 3+ messages in thread
From: Andre Schwarz @ 2010-11-05 9:21 UTC (permalink / raw)
To: u-boot
Scott,
looks like I made a mistake on current MPC8377 NAND wiring.
Nand-Flash "write enable" is wired to LFWE1 ... I connected each WE to
its corresponding CS, i.e. :
- CS0/WE0 -> Nor Flash
- CS1/WE1 -> Nand Flash
- CS2/WE2 -> MRAM
Am I assuming right that FCM can only use WE0 ?
Do you see any issue with connecting all devices to WE0 since they have
distinct chip selects ?
Regards,
Andr?
MATRIX VISION GmbH, Talstrasse 16, DE-71570 Oppenweiler
Registergericht: Amtsgericht Stuttgart, HRB 271090
Geschaeftsfuehrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner
^ permalink raw reply [flat|nested] 3+ messages in thread
* [U-Boot] NAND on eLBC
2010-11-05 9:21 [U-Boot] NAND on eLBC Andre Schwarz
@ 2010-11-09 19:36 ` Scott Wood
2010-11-10 8:36 ` Andre Schwarz
0 siblings, 1 reply; 3+ messages in thread
From: Scott Wood @ 2010-11-09 19:36 UTC (permalink / raw)
To: u-boot
On Fri, 5 Nov 2010 10:21:53 +0100
Andre Schwarz <andre.schwarz@matrix-vision.de> wrote:
> Scott,
>
> looks like I made a mistake on current MPC8377 NAND wiring.
>
> Nand-Flash "write enable" is wired to LFWE1 ... I connected each WE to
> its corresponding CS, i.e. :
>
> - CS0/WE0 -> Nor Flash
> - CS1/WE1 -> Nand Flash
> - CS2/WE2 -> MRAM
>
> Am I assuming right that FCM can only use WE0 ?
I think so. It looks like the other lines were meant to be byte
selects for NOR/UPM, not anything to do with the chip select.
> Do you see any issue with connecting all devices to WE0 since they have
> distinct chip selects ?
I guess not, especially if that's the only way the FCM works.
But to be sure, maybe ask official Freescale support channels, and/or
someone who's more familiar with the hardware side of this stuff.
-Scott
^ permalink raw reply [flat|nested] 3+ messages in thread
* [U-Boot] NAND on eLBC
2010-11-09 19:36 ` Scott Wood
@ 2010-11-10 8:36 ` Andre Schwarz
0 siblings, 0 replies; 3+ messages in thread
From: Andre Schwarz @ 2010-11-10 8:36 UTC (permalink / raw)
To: u-boot
Scott,
>> looks like I made a mistake on current MPC8377 NAND wiring.
>>
>> Nand-Flash "write enable" is wired to LFWE1 ... I connected each WE to
>> its corresponding CS, i.e. :
>>
>> - CS0/WE0 -> Nor Flash
>> - CS1/WE1 -> Nand Flash
>> - CS2/WE2 -> MRAM
>>
>> Am I assuming right that FCM can only use WE0 ?
>>
> I think so. It looks like the other lines were meant to be byte
> selects for NOR/UPM, not anything to do with the chip select.
>
ok - understood.
>> Do you see any issue with connecting all devices to WE0 since they have
>> distinct chip selects ?
>>
> I guess not, especially if that's the only way the FCM works.
>
After some rework (LFWE1->LFWE0) the NAND Flash is now working fine.
Regards,
Andr?
MATRIX VISION GmbH, Talstrasse 16, DE-71570 Oppenweiler
Registergericht: Amtsgericht Stuttgart, HRB 271090
Geschaeftsfuehrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner
^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-11-05 9:21 [U-Boot] NAND on eLBC Andre Schwarz
2010-11-09 19:36 ` Scott Wood
2010-11-10 8:36 ` Andre Schwarz
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