Lpc2000

--- In lpc2000@yahoogroups.com, Robert Adsett <subscriptions@...> 

> It really stinks of an underlying HW race 
> condition.

I think the kind hardware *and* software (in the supplied Bootloader)
problems on the LPC Family is without precedent.

The hardware problems -- have a look at LPC2292 errata: VPBDIV has to
be read twice; it gets corrupted when external interrupt mode is set;
MAM timing has to be set even if it is not used; ADC will miss
conversions; SPI interrupt flag gets unintentionally cleared; TIMER
will miss interrupts under some conditions; UART generates spurious
interrupts in the receive channel; and the link register contents
incorrect when abort occurs in THUMB mode after certain instruction
sequence.  This is just the list of problems I had to deal with, and
there are more in the Errata.

The software problems -- implementation of boot loader ISP mode pin
function clashes with DCD requirements when UART0 is used in slave
mode; boot loader external bus select implementation clashes with use
of analog inputs, how it attempts to provide security, how it
interfaces with the outside world.

Never have I see so much discussion about hardware solutions to
software problems as much as I have in this forum.

I find it intimidating to entertain the notion of hardware fixes
software problem.

Jaya