30 Jul
2007
30 Jul
'07
9:56 p.m.
dwight elvey wrote:
Hi
First try removing the Maxim chip. It may be shorted. Next,
send a copy of the code you are using to control and what
frequncy the processor is running at. If the crystal isn't 12 MHz
( as I recall ) the baud rate may be differnt.
Dwight
I've checked the output from the MCS-51 by putting a probe on the leg
and noticed the same thing. I think the Maxim is dutifully raising the
voltage to 10VDC from 5VDC, as it should.
I don't have control over the code - it's probably burned into this
variant of the MCS-51. Even if I have the bps rate wrong, I should
still some garbage flowing across serial interface.
Mike