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C6424 EVM doesn't reset

Started by "Yang, Chunhua" April 23, 2009
Dear All,

I use C6424 EVM board for some simple programme about EMIFA. When I connect any one of EMIF 16-bit data bus pins (working as a GPIO, any GPIO pin among 16 GPIO pins) to either ground or 3.3 V, my programme doesn't reset! However, if I dont connect any pins, it does reset properly.

Can any one help me out?

Best Regards,
Yang
Yang,

On Thu, Apr 23, 2009 at 10:29 AM, Yang, Chunhua wrote:
> Dear All,
>
> I use C6424 EVM board for some simple programme about EMIFA. When I
> connectany oneofEMIF 16-bit data bus pins (working as aGPIO, any GPIO
> pin among 16 GPIO pins) to either ground or 3.3 V, my programme doesn't
> reset! However, if I dont connect any pins, it does reset properly.
>
> Can any one help me out?

Check the datasheet - I believe that those pins affect the boot mode
of the device which could cause your symptom.
Try to enable your forced inputs after reset.

mikedunn
>
> Best Regards,
> Yang
>

--
www.dsprelated.com/blogs-1/nf/Mike_Dunn.php

_____________________________________
Hello Mike

Thanks a lot for your reply.

I did check datasheet but still have no idea about how data bus pins (multiplexed with GPIO, I just configured them as GPIO after reset) affect the boot mode of the device.

About "enable your forced inputs after reset", what I did is just to emulate daughtercard connection which will use 16-bit data bus configured as 16 GPIO pins for simplicity at the moment. So I dont know if there is a way to enable these pins coz when daughtercard get connected, these pins should be either 0.0 V or 3.3 V.

Best Regards,
Yang
________________________________________
From: Michael Dunn [m...@gmail.com]
Sent: 24 April 2009 04:41
To: Yang, Chunhua
Cc: c...
Subject: Re: [c6x] C6424 EVM doesn't reset

Yang,

On Thu, Apr 23, 2009 at 10:29 AM, Yang, Chunhua wrote:
> Dear All,
>
> I use C6424 EVM board for some simple programme about EMIFA. When I
> connect any one of EMIF 16-bit data bus pins (working as a GPIO, any GPIO
> pin among 16 GPIO pins) to either ground or 3.3 V, my programme doesn't
> reset! However, if I dont connect any pins, it does reset properly.
>
> Can any one help me out?

Check the datasheet - I believe that those pins affect the boot mode
of the device which could cause your symptom.
Try to enable your forced inputs after reset.

mikedunn
>
> Best Regards,
> Yang
>

--
www.dsprelated.com/blogs-1/nf/Mike_Dunn.php

_____________________________________