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PICList Thread
'I2C peripherals?'
1997\03\24@120259 by Robert Zeff

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Hi,
I need to extend the I/O capability of the PIC.  Is there a
standard I2C or other serial peripheral that has 8 or more
outputs?

Thanks!
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1997\03\24@144344 by SHAWN ELLIS

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> Hi,
> I need to extend the I/O capability of the PIC.  Is there a
> standard I2C or other serial peripheral that has 8 or more
> outputs?
>
> Thanks!
>               \\\|///
Yeah, there's a Phillips part no. for that, an 8-pit I/O port that
hangs off an IIC line.  Ask for the phillips IIC catalog.

1997\03\24@151323 by Robert Lunn

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>I need to extend the I/O capability of the PIC.  Is there a
>standard I2C or other serial peripheral that has 8 or more
>outputs?

       PCF8574 from Philips.

       See http://www.semiconductors.philips.com/

___Bob

1997\03\24@171544 by Paul Bjork

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Anyone know the URL of this Phillips division to get info?

1997\03\24@174157 by Tony Matthews

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Robert Zeff wrote:
{Quote hidden}

hi
I used a 74hc595 shift register/latch takes three pins ser data ser
clock & latch. Tony M.

1997\03\24@191344 by Robert Zeff

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part 0 241 bytes
-----Original Message-----
From:   Paul Bjork [SMTP:bjork012spamKILLspamTC.UMN.EDU]
Sent:   Monday, March 24, 1997 7:01 AM
To:     .....PICLISTKILLspamspam.....MITVMA.MIT.EDU
Subject:        Re: I2C peripherals?

Anyone know the URL of this Phillips division to get info?

1997\03\24@205758 by Harold Hallikainen

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>Robert Zeff wrote:
>>
>> Hi,
>> I need to extend the I/O capability of the PIC.  Is there a
>> standard I2C or other serial peripheral that has 8 or more
>> outputs?


       There are also a bunch of peripheral drivers available from
Allegro.  I've used their 5832 which provides 32 open drain outputs with
a serial in and out.  The serial out is nice so you can cascade them and
get as many outputs as you want, using only 3 I/O lines on the PIC.

Harold

1997\03\24@224539 by Robert Zeff

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part 0 838 bytes
> Harold

Thanks for the tip (and others that have responded).  Anyone know where
I can get more info on Allegro?  A URL?

Thanks,
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1997\03\25@011335 by Prashant Bhandary

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At 07:26 PM 24/03/97 -0800, you wrote:
>
>>        There are also a bunch of peripheral drivers available from
>> Allegro.  I've used their 5832 which provides 32 open drain outputs with
>> a serial in and out.  The serial out is nice so you can cascade them and
>> get as many outputs as you want, using only 3 I/O lines on the PIC.
>
>> Harold
>
>Thanks for the tip (and others that have responded).  Anyone know where
>I can get more info on Allegro?  A URL?

http://www.allegromicro.com

Some of the 58XX datasheets are online in PDF format.

Regards

Prashant
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1997\03\25@041237 by mike

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In message  <@spam@01BC382E.49FA1AF0KILLspamspamip105-mod4.ainet.com> KILLspamPICLISTKILLspamspamMITVMA.MIT.EDU
writes:
> Hi,
> I need to extend the I/O capability of the PIC.  Is there a
> standard I2C or other serial peripheral that has 8 or more
> outputs?
>
There is a little known Nat Semi serial EEPRom with 8 i/o lines:
NM95C12. It is microwire rather than iic, but may do what you
need.

Regards,

Mike Watson

1997\03\25@083854 by Peter J (GEA, 068974)

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I don't know the Allegro URL, but they get their silicon from Sanken
Electronic Components.  The European contact is:
Allegro MicroSystems
Balfour House, Churchfield Road
Walton-on-Thames, Surrey KT12 2TD, UK
(44-1932)253-355

US Contact:
(508)ALLEGRO

{Quote hidden}

1997\03\25@173515 by Andy Kunz

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>        There are also a bunch of peripheral drivers available from
>Allegro.  I've used their 5832 which provides 32 open drain outputs with
>a serial in and out.  The serial out is nice so you can cascade them and
>get as many outputs as you want, using only 3 I/O lines on the PIC.

I've used the MIC5841 from Micrel for similar purposes.  It has high-power
outputs.

Andy


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Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865
         Hardware & Software for Industry & R/C Hobbies
       "Go fast, turn right, and keep the wet side down!"
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