help needed for interfacing keypad and lcd with at89c51

Started by sharafat1978 September 8, 2004
Hi all
i hope u r fine
i am new to this group
i need help abt interfacing keypad (4 rows, 5 colm) and LCD ( 2 x 16)
with at89c51 microcontroller.
plz do send me assembly program and circuit diagram if possible..
thanks
sheeje
islamabad


On Wed, 08 Sep 2004 11:42:11 -0000 you wrote:

>
>Hi all
>i hope u r fine
>i am new to this group
>i need help abt interfacing keypad (4 rows, 5 colm) and LCD ( 2 x 16)
>with at89c51 microcontroller.
>plz do send me assembly program and circuit diagram if possible..
>thanks
>sheeje
>islamabad

The at89c51 isn't an AVR chip.
--
Ralph Hilton
http://www.ralphhilton.org
C-Meter: http://www.cmeter.org
FZAOINT http://www.fzaoint.net



On Wed, 8 Sep 2004, Ralph Hilton wrote:

> On Wed, 08 Sep 2004 11:42:11 -0000 you wrote:
>
> >
> >Hi all
> >i hope u r fine
> >i am new to this group
> >i need help abt interfacing keypad (4 rows, 5 colm) and LCD ( 2 x 16)
> >with at89c51 microcontroller.
>
> The at89c51 isn't an AVR chip.
> --

I haven't used that chip but I believe it's an 8051-like chip. If you can
get a copy of the Intel Microcontroller Handbook, it has several examples
of interfacing a keypad to an 8051.

Zack



hi
i have some subprograms for at89s51(the same as urz)
but the keypad scan is written for 4*4
if can be uzful mail me to attach it for u
kind regards
soheil zarrin
sharafat1978 <sharafat1978@shar...> wrote:
Hi all
i hope u r fine
i am new to this group
i need help abt interfacing keypad (4 rows, 5 colm) and LCD ( 2 x 16)
with at89c51 microcontroller.
plz do send me assembly program and circuit diagram if possible..
thanks
sheeje
islamabad ---------------------------------
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