On Fri, 15 Nov 2002 09:19:43 -0600 you wrote:

> So the BOR bit is only of use if you've checked the POR and find it was
> not a cold boot.  Have I got that right?  (I wish the manual would just
> come out and say that in plain english!)  I am still confused as to why
> the Status, TO bit seems to be cleared every time I cold start this thing.
>  The manual seems to say in plain english that this won't happen.

FWIW, I consistently see both NOT_TO=1 and NOT_POR=1 upon Power On,
which is also wrong.  Table 14-4 clearly shows NOT_POR=0 at Power On.

According to the PIC16F628 datasheet it should be possible to differentiate
between Power-on Reset, Brown-out Detect, an external MCLR reset, and WDT
timeout.  Also the later two from SLEEP.

Could anyone post some [pseudo] code to be placed at the start of a
program and jump to arbitrary locations depending upon the reset
conditions as above?

This was my first effort, but I found it always jumped to 'Oops':

        bsf STATUS,RP0          ;BANK 1.
        btfsc PCON,NOT_POR      ;is this Power-On reset?
        goto Oops               ;no! not POR, must be WDT or BOD reset.
        bsf PCON,NOT_POR        ;yes! set bit to detect future POR.
        bcf STATUS,RP0          ;BANK 0.

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