Lpc2000

--- In lpc2000@yahoogroups.com, "jayasooriah" <jayasooriah@...> 
wrote:
> The user (like you) can set everything back to the reset state if 
they so wished. 

Maybe if you had experience of a peripheral that can't be reset by 
software you'd have a different view. The UARTs in some members of 
the NEC V850 familiy have this "feature": they can get locked into 
modes that only a hardware reset can clear.

By definition (unless it's being used to implement something like 
a "soft reset" feature), when a watchdog has expired the system is 
in an unusual and unknown state. I'd much rather a system that the 
watchdog is guaranteed to get it back into a known, initial state 
than run the risk of being the first to discover the peripheral and 
mode that can't be recovered by software. The Philips part (and most 
others for that matter) gives this guarentee: a watchdog reset is 
the same as a power-on or hard reset (other than the reset source 
identifier). That's just the way I like it, thanks.

> In the LPC, it does it for you in a way that watchdog and
> analog inputs are mutually exclusive resources.

Can you explain the issue here, please? Why are analog i/ps and the 
watchdog mutually exclusive?

Brendan