Power on reset

Einly · Joined: 10 Sep 2003 Posts: 60

Dear all,

I am doing a reset as suggested earlier:

#asm
MOVLW 0
MOVWF PLCATH
GOTO 0
#endasm

I noticed that by writing this line, it is not exactly function like a power on reset. I am using PIC16f876, CCS Compiler version 2.734.

By the way, does the USART_Transmit_Buffer_Full bit in the TXSTA register reset to the default state, i.e. 1? If not, what should I do to reset it? Is there any other way for me to simulate a power-on reset?

Thanks a lot
_________________
Einly

Haplo · Joined: 06 Sep 2003 Posts: 659 Location: Sydney, Australia

The default state of the registers are mentioned in the datasheet.
What you are doing just jumps to the beginning of the program, it does not reset any of the registers.

Try letting the watchdog time out instead.

ckielstra · Joined: 18 Mar 2004 Posts: 3680 Location: The Netherlands

From the Microchip application note on bootloaders AN851:

jds-pic · Joined: 17 Sep 2003 Posts: 205

jds-pic · Joined: 17 Sep 2003 Posts: 205

but if you want to know how to re-initialize all of the PICs internal registers to "simulate" a power-on reset condition, read this thread in it's entirety:

http://www.ccsinfo.com/forum/viewtopic.php?t=20282

jds-pic