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'[PIC]: [EE]: 1 I/O interface to LCD - ONE chip sol'
2003\02\15@083146 by Marcelo Puhl

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What about this one chip solution:

http://www.myke.com/lcd.htm


On 15 Feb 2003 at 16:05, WH Tan wrote:

{Quote hidden}

> > {Original Message removed}

2003\02\15@101621 by Tal

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HI

could it be use for connecting pc parallel port?
i.e.. send data from port to lcd using less wires?
has anyone done it?

Tal
{Original Message removed}

2003\02\15@132829 by WH Tan

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Actually my main goal is to interface with only one PIC's I/O.
Then I work out my 1st design, which used 5 chips(8-bits mode)/4
chips(4-bits mode). And Bob suggested to me a 2 chips solution.

Thanks for your reply.

Regards.

WH Tan

----- Original Message -----
From: "Marcelo Puhl" <spam_OUTmarkTakeThisOuTspamCPOVO.NET>
To: <.....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU>
Sent: Saturday, February 15, 2003 10:27 PM
Subject: Re: [PIC]: [EE]: 1 I/O interface to LCD - ONE chip solution


> What about this one chip solution:
>
> http://www.myke.com/lcd.htm
>

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2003\02\15@183149 by Igor Pokorny

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Hello Tan.
I suggest you a solution with one pin of a PIC. I haven't proved it if it
works, but it's an idea at least.
Use some sort of 4094, outputs to LCD d7..d4, d/i, r/w and E. E must be tied
to Vss by a resistor.
Connect an output pin of a PIC to D input, by C to clock with resistor tied
to Vdd and by diode to STR.
STR input has a capactor to Vss and resistor to Vdd. OE of 4094 is in high
state all the time.
Output of a PIC is at high level, so STR, CLK is high as well, the output is
enable.
When you drive output to low level for a certain time, STR and CLK signals
go to low. the output of 4094 is NC.
STR is going to Vdd and when reached high level with input still in low
level, zero will be written to serial register.
If input low level isn't long enough to allow CLK reachs high, the one will
be written to serial register in the time when input gets from low to high
level.
When input stay enough long in high level, the STR input gets high and
writes result to output buffer.
Hope it helps you a little.

Igor

{Original Message removed}

2003\02\16@230448 by WH Tan

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part 1 1736 bytes content-type:text/plain;Thanks a lot Igor.
Just to make sure I am not interpreting anything wrongly. Is this what you
means?
Thanks again.


WH Tan

> {Original Message removed}
part 2 5479 bytes content-type:image/gif; (decode)


part 3 2 bytes
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2003\02\17@044315 by so-8859-1?Q?Ing_Igor_Pokorn=FD?=

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Exactly by my meaning. Let me know if it works.

Igor

-----Original Message-----
From: pic microcontroller discussion list [.....PICLISTKILLspamspam.....MITVMA.MIT.EDU]On
Behalf Of WH Tan
Sent: Monday, February 17, 2003 5:12 AM
To: EraseMEPICLISTspam_OUTspamTakeThisOuTMITVMA.MIT.EDU
Subject: Re: [PIC]: [EE]: 1 I/O interface to LCD - ONE chip solution


Thanks a lot Igor.
Just to make sure I am not interpreting anything wrongly. Is this what you
means?
Thanks again.


WH Tan

{Quote hidden}

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2003\02\19@064332 by Djula Djarmati

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-----Original Message-----
From: WH Tan <KILLspamtanwhKILLspamspamNOTES.SRC.GLOBAL.SHARP.CO.JP>
To: RemoveMEPICLISTTakeThisOuTspamMITVMA.MIT.EDU <spamBeGonePICLISTspamBeGonespamMITVMA.MIT.EDU>
Date: Monday, February 17, 2003 5:08 AM
Subject: Re: [PIC]: [EE]: 1 I/O interface to LCD - ONE chip solution


{Quote hidden}

high
>> state all the time.
>> Output of a PIC is at high level, so STR, CLK is high as well,
>> the output is
>> enable.
>> When you drive output to low level for a certain time, STR and CLK
signals
>> go to low. the output of 4094 is NC.
>> STR is going to Vdd and when reached high level with input still in low
>> level, zero will be written to serial register.
>> If input low level isn't long enough to allow CLK reachs high,
>> the one will
>> be written to serial register in the time when input gets from low to
high
>> level.
>> When input stay enough long in high level, the STR input gets high and
>> writes result to output buffer.
>> Hope it helps you a little.
>>
>> Igor

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2003\02\19@064333 by Djula Djarmati

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part 1 449 bytes content-type:text/plain; (decoded 7bit)

   This is a working circuit with 1 I/O. It also controls the power to the
LCD and has one free output and input. The ASM file is a demo for 16F628 at
4MHz, one byte to LCD takes about 1ms.
   Now, where can I buy one of those 10c 3-pin PICs Roman was talking
about?

Djula

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part 2 10496 bytes content-type:application/x-zip-compressed; (decode)

part 3 2 bytes
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