Are you getting contention when/if A4 and B3 connected together? i.e. with =
A4=20
driving low and B3 driving low that might produce about a 2V high level.

On 16 Sep 2015 at 16:26, IVP wrote:

> Hi all,
>=20
> I'm trying to figure out what's up here.
>=20
> In the attached circuit, I'm driving a logic level FET with a 5V
> 18LF1320
>=20
> The Standard PWM output (b3) wave drops to 2V when
> connected to the 10R gate resistor. The FET doesn't turn
> on
>=20
> The wave from the open-drain a4 + pull-up is 5V right to
> the gate, the motor runs and is adjustable
>=20
> PWM frequency from b3 or a4 is  ~2kHz
>=20
> The datasheet says that each PIC pin (including presumably
> b3) can source 25mA, yet the gate current through the 360R
> is only 14mA.
>=20
> Any ideas ?
>=20
> TIA
>=20
> Joe



--=20
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