Distinguishing a brown out reset (BOR/) on PIC16f627

[jmkuss]

I have not been able to distinguish a brown out reset (BOR/) from a normal power on reset (POR/) on the PIC16F627.

I do realise that when a POR/ power on reset happens you must
set the BOR bit to be ready to tell if a brown out occurs latter,
(Then it will clear the BOR/ BIT) but when ever I attempt to simulate a Brown out by lowering the voltage VCC down from 5 to 4 volts the PIC does do a brown out reset, but then when I raise the voltage back up to 5 volts via turning the adjust knob on my variable power supply, I immediatly see a power on reset occur so therefore my code can not distinguish this from a BOR.

I thought you could generate a BOR/ reset without also generating a POR/
but it appears not to be so.

Joe

[joe_kuss]

My previous comments were correct.
My problem was as follows.

#BYTE PCON_REG=0x8E
#BIT BOD_BAR=PCON_REG.0
#BIT POR_BAR=PCON_REG.1

This is the CCS compiler way to access these SFRs and bits in C.

The PIC "DS40300C" DATA SHEET FOR the 16F62X has a typo on page
24 where it says the address of the PCON register is 0x0C, it really is
0x8E as stated in a number of other places on this data sheet.

The above code snippet has been corrrected and now BOR acts like
I expected.

Joe