Re: [Sdcc-user] Setting up and sending serial messages

[Gernot F. <g....@gm...>]

On Mon, 20 Jun 2005, J S wrote:
>=20
> Yea, I would've used one of those LCDs, but the
> project I'm planning on doing is going to require
> quite a few pins from the microcontroller that is not
> just for LCD.  Since the 2051 only has 20 pins, it
> makes adding other components to the microcontroller
> with a LCD that uses half of the available pins a bit
> difficult.  Thats why I went with the serial LCDbug.

Use an 4094  8bit shiftregister to connect the Display in 4-bit mode.
This need 3 pinns.
You can reduce the pins with a RC for strobe.

Or a bit expansive use a PCF8574 IIC-Portexpander. This use 2 pins.=20
You get 8 bidirektional portpins. One or 2 of them are free after connect=
ing the
Display.


--=20
MFG Gernot