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Push Button reset problem with TMS320C6416

Started by ramya_m September 16, 2004
Hi ,

This is regarding a problem that we are facing with our board ,
TMS320C6416 - D6E3 (Silicon Errata version 1.1).We are performing
secondary boot loading.When the board is reset via the emulator or
via power on , the secondary boot loader executes as required.We are
able to view the CE and the ARE control signals being issued to the
Flash.But , during manual reset (push button) , the DSP hangs , and
no control signals are issued ( to any of the CE spaces , even the
CE1 space , which the on chip bootloader queries during boot-
up).Could you please help us out at the earliest.

Thanks and best regards,
Ramya. Ramya Mohan
Systems Engineer
Accord Software & Systems
Bangalore
India
Telephone :25350105 Ext:150




--- ramya_m <> wrote:

> But , during manual reset (push button) , the
> DSP hangs , and
> no control signals are issued ( to any of the CE
> spaces , even the
> CE1 space , which the on chip bootloader queries
> during boot-
> up).Could you please help us out at the earliest.

hm... I may be totally wrong, but what is the state of
your "boot mode" selection pins (BEA[19:18]) while
you're pushing that reset button?

Wojciech Rewers
currently looking for a job in the UK

__________________________________




Ramya,
 
If your 'boot mode' is correct during reset, the problem may be that your pushbutton is not properly debounced.  If the DSP is "seeing" multiple pulses of incorrect minimum width and/or excessive frequency it may have problems.  When a button switch is pushed and/or released, it is not uncommon to see several 'noise pulses'.  Your switch should go into a circuit that will provide a single pulse that exceeds TI's min pulse width spec [I suggest exceeding it by a factor of 2].
 
let us know how things work out...
mikedunn
"Wojciech Rewers (Voytek)" <w...@yahoo.com> wrote:

--- ramya_m wrote:

> But , during manual reset (push button) , the
> DSP hangs , and
> no control signals are issued ( to any of the CE
> spaces , even the
> CE1 space , which the on chip bootloader queries
> during boot-
> up).Could you please help us out at the earliest.

hm... I may be totally wrong, but what is the state of
your "boot mode" selection pins (BEA[19:18]) while
you're pushing that reset button?

Wojciech Rewers
currently looking for a job in the UK

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