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Discussion Groups | 68HC12 | reset of controller at irregular intervals
Join our technical discussions about Freescale Microcontrollers: M68HC12. (Freescale Semiconductor is a Subsidiary of Motorola).
reset of controller at irregular intervals - mail...@gmail.com - May 21 9:48:33 2008
hai guys,
have a gud day. i am facing a reset of microcontroller at 10.74 to 10.8 volt supply range.i checked the LVI(VDD pin its fine as 5v),watchdog timer reset (i disabled it and runned still the problem exists,i can't find the reason how to identify the cause.can anyone of the experts guide me in this?
regards,
boobal
------------------------------------
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
have a gud day. i am facing a reset of microcontroller at 10.74 to 10.8 volt supply range.i checked the LVI(VDD pin its fine as 5v),watchdog timer reset (i disabled it and runned still the problem exists,i can't find the reason how to identify the cause.can anyone of the experts guide me in this?
regards,
boobal
------------------------------------
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Re: reset of controller at irregular intervals - Edward Karpicz - May 22 1:46:07 2008
you wrote:
> hai guys,
> have a gud day. i am facing a reset of microcontroller at 10.74 to 10.8
> volt supply range.i checked the LVI(VDD pin its fine as 5v),watchdog timer
> reset (i disabled it and runned still the problem exists,i can't find the
> reason how to identify the cause.can anyone of the experts guide me in
> this?
>
First of all what part are you using? You have LVI, so is it S12C, S12XD? I
have no chances to guess what's causing reset in your case. LVR is engaged
well lower than 5V. However you should note that LVRF flag (did you check
this flag?) is packed with PORF and RTIF into single register, so you should
make sure you are not clearing LVRF before you read it. I mean that for
example doing this in CW:
CRGFLG_RTIF=1;
does also clear LVRF and all other CRGFLG register flags.
Regards,
Edward
> regards,
> boobal
>
------------------------------------
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
> hai guys,
> have a gud day. i am facing a reset of microcontroller at 10.74 to 10.8
> volt supply range.i checked the LVI(VDD pin its fine as 5v),watchdog timer
> reset (i disabled it and runned still the problem exists,i can't find the
> reason how to identify the cause.can anyone of the experts guide me in
> this?
>
First of all what part are you using? You have LVI, so is it S12C, S12XD? I
have no chances to guess what's causing reset in your case. LVR is engaged
well lower than 5V. However you should note that LVRF flag (did you check
this flag?) is packed with PORF and RTIF into single register, so you should
make sure you are not clearing LVRF before you read it. I mean that for
example doing this in CW:
CRGFLG_RTIF=1;
does also clear LVRF and all other CRGFLG register flags.
Regards,
Edward
> regards,
> boobal
>
------------------------------------
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )