Re: ColdFire 5307 start up problem using CS1 with byte access

Are you really sure you want BSTR and BSTW?

> -----Original Message-----
> From: swiftx-bounce_at_forth.com [mailto:swiftx-bounce_at_forth.com]On Behalf
> Of Jacek Myzyk
> Sent: Thursday, October 14, 2004 13:23
> To: swiftx_at_forth.com
> Subject: [swiftx] ColdFire 5307 start up problem using CS1 with byte
> access
>
>
> Hello,
>
> I'm using Motorola MCF5307 with SwiftX ColdFire 2.04.5
>
> instead of dynamic ram with CS1 I am using static ram,
> everything was fine ( for last 4 years) when ram chip was 16 bit with
> no byte access
>
> now I have new CPU board with 16 bit ram which has two pins for
> byte access,
> BE0 96/5307 is connected to BHE# of ram
> BE1 98/5307 is connected to BLE# of ram
>
> in start.f I changed
> $1DC0 # D0 MOV D0 CSCR1 A0) W. MOV \ no byte access
> to
> $1DF8 # D0 MOV D0 CSCR1 A0) W. MOV \ with byte access
>
> and ColdFire does not start, unless I put the two ram pins to GND
> for initial start up defined in start.f
> and then I allow connection ( mentioned above) just before my
> software starts
> to run - in this case everything is ok, I have both 16bit & 8bit access
>
> I am not sure at this moment if this is software or hardware issue.
>
> Service request to Motorola ( Freescale) did not help
>
> Did anybody encounter that problem ?
>
> Thanks
>
> Jacek Myzyk
>
> Gem Systems Inc.
>
>
>
>
>
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Received on Fri Oct 15 2004 - 11:18:33 PDT