Lpc2000

--- In lpc2000@yahoogroups.com, "relentless_6995" <bobd@c...> wrote:
To summarize: After careful testing it seems that if you enter power 
down with both the PDBOD and PD bits set (as opposed to only the PD 
bit) the unit does not wakeup properly - at least I can't figure out 
what its doing. This was done on an LPC2132. Any Philips guys out 
there want to comment?

> Hi everyone,
> 
> Any ideas why it appears that in the PCON register if I have 
> the /PDBOD bit set when I set the PD bit, the processor does not 
> wakeup and resume execution as expected. This happens if I write 
an 
> 0x06 to PCON ... OR first write a 0x04 followed by a 0x02 (the 
0x02 
> finally putting into power down mode). Setting the /PDBOD bit 
along 
> with the PD is suppose to disable brown out detect during power 
down 
> mode.
> 
> - using EINT1 to generate wakeup condition (this part seems to 
work 
> fine)
> 
> - if both bits are set seems wake up and appears to start code 
> execution at 0x0 (like a complete reset happened) - but this 
> complete reset behavior isn't consistent
> 
> - if only the PD bit is set when entering power down the EINT1 
wakes 
> up and code execution resumes as expected
> 
> - have shown the behavior whether EINT1 generates an actual IRQ 
that 
> the VIC services or if I just have code resume on the next 
> instruction
> 
> Anybody know what I'm missing?