> Van: Starfire Zhu <zhuxh@cheerful.com>
> Aan: PICLIST@MITVMA.MIT.EDU
> Onderwerp: RESET Problems on PICs
> Datum: woensdag 22 april 1998 19:24
>
> Hi, pauls on the list,
>
> I just entountered a problem in my  recent project. As I am a green hand
> in PIC application, I'd like to share this with you, and hope I can get
> some advice.
>
> My problem is about the identification of RESET STATUS of PICs at work.
> If the PIC(e.g. P16c54) has disabled the WDT and doesn't use SLEEP on
> whole process, after RESET on MCLR, how could I reliably determine
> whether this RESET is caused by POWER-ON or MCLR? In other words,
> is there any FLAG BIT that can change its value in different RESETs?
>
> Do you have any suggestion? Thanks in advance!

Yes, I have.
In the documents about the PIC16C5? it say's :

Document : DS30015N
Page        : 4-31

Reset conditions for special registers:
Condition                 Status-register
------------------------------ ----------------------
Power-On reset          0001 1xxx
MCLR                        000u uuuu
MCLR from Sleep       0001 0uuu
WDT reset                 0000 1uuu
WDT from Sleep        0000 0uuu

x = Unknown
u = Unchanged

Hope this helps

Greetz,
  Rudy Wieser

P.s.
This document is available at the Microchip-site