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'[OT] Keypad IC added to lineup'
1999\10\30@165211 by Todd Peterson

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Greetings all,

Just wanted to make a quick announcement to the list that our line of
embedded circuit building block IC's has been added to with our EDE1144
Keypad Encloder IC.  Datasheet is at http://www.elabinc.com/chips.htm

In addition, we're currently developing an octal 7-segment LED driver IC
with count functionality.  Any input on desired functionality would be
welcomed.

The EDE1144 IC press release is posted below.

Thanks!

Todd Peterson
E-Lab Digital Engineering, Inc.

  (816) 257-9954  FAX: (816) 257-9945
  http://www.elabinc.com



--New Semiconductor Announcement--

4x4 Keypad Encoder IC

We're pleased to announce an addition to our EDExx Family of integrated
circuits.  The EDE1144 4x4 Keypad Encoder IC is designed to interface a 4x4
(or smaller) multiplexed keypad to a host microcontroller.  Outputs are
serial (2400/9600 Baud) or parallel.

The EDE1144 features key debouncing and key auto-repeat when held.  It is
electrically (EMI) quiet, scanning the keypad only once when a keypress is
detected, rather than a continual scan.  A beeper drive signal provides
tactile feedback to the operator upon keypress.

Available in 18 pin DIP or SOIC packages, the EDE1144 sells for $7 US
Dollars quantity 1, and $3.25 1K pricing.  A datasheet and full pricing
information is available at http://www.elabinc.com/chips.htm

E-Lab Digital Engineering, Inc.
http://www.elabinc.com

Note: Serious Distributor Inquiries for the EDExx Family of IC's are
welcomed.

1999\10\31@141549 by l.allen

picon face
Someone wrote...
> Just wanted to make a quick announcement to the list that our line of
> embedded circuit building block IC's has been added to with our EDE1144
> Keypad Encloder IC.  Datasheet is at http://www.elabinc.com/chips.htm
>
> In addition, we're currently developing an octal 7-segment LED driver IC
> with count functionality.  Any input on desired functionality would be
> welcomed.
>

I might be a bit thick (they all say yes!)
BUT
Isnt the whole point of being a PIC/ microcontroller developer that
you do your own keypad/ display driver/ serial comms/ etc with the
PIC/s you are using?

I would imagine the target for such products were the
non-microcontroller developer.
_____________________________

Lance Allen
Technical Officer
Uni of Auckland
Psych Dept
New Zealand

http://www.psych.auckland.ac.nz

_____________________________


'[OT] Keypad IC added to lineup'
1999\11\01@110655 by White Horse Design
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<x-flowed>At 23:50 30/10/1999 , you wrote:
>4x4 Keypad Encoder IC
>
>We're pleased to announce an addition to our EDExx Family of integrated
>circuits.  The EDE1144 4x4 Keypad Encoder IC is designed to interface a 4x4
>(or smaller) multiplexed keypad to a host microcontroller.  Outputs are
>serial (2400/9600 Baud) or parallel.
>
>The EDE1144 features key debouncing and key auto-repeat when held.  It is
>electrically (EMI) quiet, scanning the keypad only once when a keypress is
>detected, rather than a continual scan.  A beeper drive signal provides
>tactile feedback to the operator upon keypress.
>
>Available in 18 pin DIP or SOIC packages, the EDE1144 sells for $7 US
>Dollars quantity 1, and $3.25 1K pricing.  A datasheet and full pricing
>information is available at http://www.elabinc.com/chips.htm

We are interested in a device that can handle 20 or 24 keys for (ahem!) an
automotive application. We need a telephone keypad and keys around an LCD
so 16 are just not enough.

We currently use a PIC 16C54 for LCD drive and keypad scanning, using HC164
shift registers to scan more rows (with enough of 'em we can scan 240 keys!!)

It would also be nice if there were a version of the 74HC922 that could
handle more than a 4x4 matrix ...

Regards

Adrian
---
WWW    WWW   Adrian Gothard
WWW WW WWW   White Horse Design
WWWWWWWWWW   +44-385-970009 (Mobile/SMS), +44-118-962-8913/4 (voice/fax)
WWWW  WWWW   spam_OUTwhdTakeThisOuTspamzetnet.co.uk, http://www.users.zetnet.co.uk/whd
---
Developers of GPS satellite-based tracking systems for vehicles/helicopters

</x-flowed>

1999\11\01@130006 by paulb

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Adrian of White Horse Design wrote:

> We are interested in a device that can handle 20 or 24 keys for
> (ahem!) an automotive application.  We need a telephone keypad and
> keys around an LCD so 16 are just not enough.

> We currently use a PIC 16C54 for LCD drive and keypad scanning, using
> HC164 shift registers to scan more rows (with enough of 'em we can
> scan 240 keys!!)

 Would not a simple migration to the 16C55 do the job?  8-bit LCD data
and 8-bit keyboard scanning share one port; on the second port, 3 lines
for LCD interface, three for keyboard sensing of 24 keys; you have 6
lines for other things.  You may save a little code space by not having
to serialise the HC164 and using the LCD in 8-bit mode.  Otherwise move
to a 16C57.

> It would also be nice if there were a version of the 74HC922 that
> could handle more than a 4x4 matrix ...

 4x5 matrix.  It's called a 74C923.  (The series is not HC.  Try
Fairchild.  Current lore is PICs are much cheaper.)
--
 Cheers,
       Paul B.

1999\11\02@130049 by Jim Main

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I did a device a while back which does 50 keys (5x10).  It scans constantly,
does N-key rollover and stacks commands - provides a 6 bit word output along
with a data ready strobe and an 'Any key down' line.

I did it to replace a chip I couldn't get any longer (KB9600) which did all
this in hardware (96 key tho')

Jim
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Jim Main                          |   Eastcom Broadcast Developments
.....jim.mainKILLspamspam@spam@eastcom.co.uk|   custom hardware and software
http://www.eastcom.co.uk
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