At 17.01 2012.04.14, you wrote:
>
>>
>>
>> After research, my best candidate is to replace the Vreg from the actual
>> LP2950 to a LP2951, and connect its ~ERROR output to MCLR, possibly
>> directly (to save components).
>>
>> What do you think about my solution? :o
>>
>
>If you use a 10k between the ERRORn output and MCLRn. Then your programmer
>can drive MCLRn to Vpp during debug and programming.

Yup, I was in the 10K range too, although the datasheet suggests from 100K =
to 1M,
it can sink 400uA and bring the line to 0.2V, so it can handle the 10K resi=
stor
for sure.

I'm gonna purchase some LP2951's now and proceed this route, i.e. not as Yo=
u
exactly suggested but ERRORn to Vcc through 10K, and ERRORn straight to MCL=
R.
Programmer straight to MCLR too. ERRORn is open drain.

This way the MPU show be forced reset until power is really ~3.3V

Gonna do some tests now with a TPS75715 I found somewhere, which is overkil=
l (3A)
but has a similar ERRORn output.

Cheers,
Mario


>
>Harold
>
>
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