A Discussion on Watch Dog Timer

This is a chat transcript of my discussion with one of my friend.

8 minutes

2:41 AM xyz: yes

2:42 AM how r u

where r u

me: i have one question related to wdt

xyz: what is wdt

me: watch dog timer

xyz: ok

2:43 AM me: ya...actually when any hardware boots up....can watchdog reset happen in the boot code itself due to anythin

xyz: can happen

2:44 AM if WDT is not disabled during bootup

Normally the Boot code disables it

I mean the Boot strap code

me: ok...in case wdt is enabled..then if time out happens then the board will power down , i guess

ok

xyz: yes

it is a cold reset

2:45 AM There are two things

Boot strap code

Boot Loader

me: ok

boot loader loads the code ??

xyz: Boot strap code disables it

Boot loader enables it

me: ok

2:46 AM ....one more doubt...can we control the real time clock's registers while boot code excutes?...

xyz: Boot strap ->First Level Boot loader ->Second level boot laoder(optional_->OS->APPLICATION

2:47 AM me: ok

can we control the real time clock's registers while boot code excutes?...

xyz: k

yes

u can make the WDT Count Large enough

2:48 AM so that reset wont happen

me: in the bootstrap code ?? [ I have very little knowledge of boot code ]

xyz: in what ever start up code , u have access to

2:49 AM me: yes....i got it

thanks man for the..help..

xyz: Np

me: ok...chat with u later

byee

2:50 AM xyz: bye