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PICList Thread
'NJU6355 Specs?'
1998\03\19@142456 by Mike Keitz

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I've got a few NJU6355 real-time clock chips but no real data for them.
I have something working based on what little I could find on the WWW but
I need to know a couple more things to be sure it's officially in spec:

* When clocking bits in, does the chip take them on the rising edge of
the clock or the falling edge?  It appears that when clocking bits out,
they change on the falling edge.

* What's the maximum clock rate/setup time, etc?

* Does the chip need the R/W pin held for the entire shifting sequence?
It would be nice to be able to share it with Clock or Data, saving a PIC
pin, but my preliminary experiments at that were not successful.

Once I get this little "test program" in shape (it reads/writes the 6355
and presents the results in ASCII RS-232), I'd be glad to post it to the
list or send it to someone to put on a WWW site.

_____________________________________________________________________
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1998\03\19@164547 by Don McKenzie

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face
Mike Keitz wrote:
{Quote hidden}

Is there enough at:
http://www.micromint.com/modules.htm
to give you what you need?
Digikey also has a spec sheet for $2 I think it is.

Don McKenzie  spam_OUTdonTakeThisOuTspamdontronics.com   http://www.dontronics.com

Don's Download Dungeon http://www.dontronics.com/download.html
For more details, send a blank message to .....infoKILLspamspam@spam@dontronics.com
or simstickspamKILLspamdontronics.com or .....basicsKILLspamspam.....dontronics.com

1998\03\19@185459 by Peter

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face
Hi Mike,
I have the JRC catalog, if you want I will scan the pages
and send to you, just let me know if you really need.
It is six pages only,
Peter

{Original Message removed}

1998\03\19@194231 by Roger L Stevens

picon face
Mike: For NJU 6355:

1. Data read in on rising edge of clock. Data output valid on rising edge
of clock

2. Min clock pulse high is 0.5 micro sec; Min clock pulse low is 0.5
micro sec
    Min CE set up before clock rising is 0.5 micro sec. Other set up and
holds
    are  well under 0.5 micro sec.

3. CE (pin  5)must be HELD high for enable and I/O HELD high for write
and HELD      low for read.

Hope this helps.

Roger
-----------------------------------------
What is a JOWETT JUPITER ?
Are there really Jowett Nuts ?
EraseMErogerlstevensspam_OUTspamTakeThisOuTjuno.com
-----------------------------------------
--------- Begin forwarded message ----------
From: Mike Keitz <mkeitzspamspam_OUTJUNO.COM>
To: @spam@PICLISTKILLspamspamMITVMA.MIT.EDU
Subject: NJU6355 Specs?
Date: Thu, 19 Mar 1998 13:04:33 -0500
Message-ID: <KILLspam19980319.130436.3254.0.mkeitzKILLspamspamjuno.com>

I've got a few NJU6355 real-time clock chips but no real data for them. I
have something working based on what little I could find on the WWW but I
need to know a couple more things to be sure it's officially in spec:

* When clocking bits in, does the chip take them on the rising edge of
the clock or the falling edge?  It appears that when clocking bits out,
they change on the falling edge.

* What's the maximum clock rate/setup time, etc?

* Does the chip need the R/W pin held for the entire shifting sequence?
It would be nice to be able to share it with Clock or Data, saving a PIC
pin, but my preliminary experiments at that were not successful.

Once I get this little "test program" in shape (it reads/writes the 6355
and presents the results in ASCII RS-232), I'd be glad to post it to the
list or send it to someone to put on a WWW site.
_____________________________________________________________________ You
don't need to buy Internet access to use free Internet e-mail. Get
completely free e-mail from Juno at http://www.juno.com Or call Juno at
(800) 654-JUNO [654-5866]
--------- End forwarded message ----------

_____________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com
Or call Juno at (800) 654-JUNO [654-5866]

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