<?xml version="1.0" encoding="UTF-8" ?>
<?xml-stylesheet type="text/xsl" href="https://community.arm.com/utility/feedstylesheets/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/"><channel><title>is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/39913/is-this-possible-to-use-same-serial-port-of-89s52-for-different-purposes</link><description> 
In my project i want to interface a GSM modem and 24c02C i.e
EEPROM (I2C based)to microcontroller. 
so now i am not understanding whether can i use same Rx-Tx pins to
interface microcontroller (89s52) to EEPROM and GSM modem as well??
if not then is</description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/143263?ContentTypeID=1</link><pubDate>Tue, 11 Dec 2012 05:06:31 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:1104fe3e-2ca6-494a-9054-7c2bf04eb9ad</guid><dc:creator>AMIT KULKARNI</dc:creator><description>&lt;p&gt;&lt;p&gt;
In case of gsm modem, i meant &amp;quot;UART&amp;quot; only.. :)&lt;/p&gt;

&lt;p&gt;
Nice explanation... :)&lt;/p&gt;

&lt;p&gt;
i got this link..&lt;/p&gt;

&lt;p&gt;
&lt;a target="_blank" href="http://www.engineersgarage.com/node/4812?i=527"&gt;&amp;quot; href=
&amp;quot;http://www.engineersgarage.com/microcontroller/8051projects/interface-serial-eeprom-24c02-AT89C51-circuit&amp;quot;&amp;gt;
&lt;a href="http://www.engineersgarage.com/microcontroller/8051projects/interface-serial-eeprom-24c02-AT89C51-circuit"&gt;www.engineersgarage.com/.../interface-serial-eeprom-24c02-AT89C51-circuit&lt;/a&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;
This is what i wanted to say.. Hope its right :) What you say
sir?&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/140388?ContentTypeID=1</link><pubDate>Tue, 11 Dec 2012 01:21:59 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:01675b82-fa6f-49e4-bbfb-772aac860389</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
This has nothing to do with Keil, and is not specific to the
8051:&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;&amp;quot;can we use any PINS to interface EEPROM to controller using
I2C&amp;quot;&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
No, you can&amp;#39;t just use &lt;i&gt;any&lt;/i&gt; pins - you must check the
microcontroller&amp;#39;s &lt;b&gt;datasheet&lt;/b&gt; to determine what pins are
suitable to use for I2C.&lt;br /&gt;
In particular, note that I2C requires open-drain (or equivalent)
drivers.&lt;/p&gt;

&lt;p&gt;
Preferably, if you need to use I2C, you would select a chip with
I2C hardware built-in.&lt;br /&gt;
In that case, the pins for I2C use would be clearly defined - in the
&lt;b&gt;datasheet&lt;/b&gt;.&lt;/p&gt;

&lt;p&gt;
But you can not use a UART for I2C!&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;&amp;quot;He can interface his GSM modem using serial port&amp;quot;&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
There are many different types of &amp;quot;serial port&amp;quot; - I2C, SPI, UART,
etc. So you need to be clear what type of &amp;quot;serial port&amp;quot;,
specifically, you are talking about.&lt;/p&gt;

&lt;p&gt;
For a GSM modem, a &lt;b&gt;UART&lt;/b&gt; would almost certainly be required
- but, as ever, you must check the &lt;b&gt;datasheet&lt;/b&gt; to be sure.&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;&amp;quot;he can use other pins to interface EEPROM&amp;quot;&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
As above.&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;&amp;quot;and in that case he can use burner kits to burn his
IC&amp;quot;&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
Sorry - that seems an entirely unrelated comment!&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/131107?ContentTypeID=1</link><pubDate>Mon, 10 Dec 2012 23:05:17 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:9477e99f-40b3-489c-9faa-1b1f90a5ae00</guid><dc:creator>AMIT KULKARNI</dc:creator><description>&lt;p&gt;&lt;p&gt;
Hello sir,&lt;br /&gt;
I have the same confusion.. i.e. can we use any PINS to interface
EEPROM to controller using I2C.&lt;br /&gt;
If it is possible then he can do it with AT89C51 also, can&amp;#39;t he?&lt;br /&gt;
i.e. He can interface his gsm modem using serial port available an he
can use other pins to interface EEPROM and in that case he can use
burner kits to burn his IC.&lt;/p&gt;

&lt;p&gt;
Please correct me if i am wrong..&lt;/p&gt;

&lt;p&gt;
Thank you :)&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/156491?ContentTypeID=1</link><pubDate>Mon, 29 Oct 2012 04:52:43 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:09d104d0-6cff-491a-b336-48bb1defc4dc</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
So you think that other chips have the RAM &lt;i&gt;dis-&lt;/i&gt;abled?!&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/156307?ContentTypeID=1</link><pubDate>Mon, 29 Oct 2012 02:55:57 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:fac2009e-a6da-481a-81aa-53e208349266</guid><dc:creator>a Collins</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;b&gt;&lt;i&gt;RE&lt;/i&gt;&lt;/b&gt; means RAM EMABLED&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/156084?ContentTypeID=1</link><pubDate>Mon, 29 Oct 2012 02:39:34 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:7bc21429-ea7a-4923-b4f2-eb5d6cfc1c38</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
The manufacturer&amp;#39;s &lt;b&gt;datasheet&lt;/b&gt; will explain the part
numbering scheme&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/155857?ContentTypeID=1</link><pubDate>Mon, 29 Oct 2012 01:57:43 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:2a740c69-4ec2-4650-a3f1-777a59888e6d</guid><dc:creator>pravin diwate</dc:creator><description>&lt;p&gt;&lt;p&gt;
what does RE mean in case of 89C51RE2 ??&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/148274?ContentTypeID=1</link><pubDate>Wed, 10 Oct 2012 05:56:27 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:d327c783-80bb-469e-955e-8dc03ef8dd0c</guid><dc:creator>&amp;#178;erik malund</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;i&gt;The best processor in the world is the CM630P&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
male cow manure, it &lt;b&gt;could&lt;/b&gt; possibly be&lt;/p&gt;

&lt;p&gt;
The best processor in the world &lt;i&gt;for the project I happen to be
doing&lt;/i&gt; is the CM630P.&lt;/p&gt;

&lt;p&gt;
if the was such a thing as &amp;quot;The best processor in the world&amp;quot; why
would there be thousands different ones&lt;/p&gt;

&lt;p&gt;
Erik&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/147838?ContentTypeID=1</link><pubDate>Tue, 09 Oct 2012 12:46:55 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:1e3de570-f054-4a57-951d-95243d3056ad</guid><dc:creator>Tamselgarir Michsofael</dc:creator><description>&lt;p&gt;&lt;p&gt;
The best processor in the world is the CM630P.&lt;/p&gt;

&lt;p&gt;
Oh yeah.&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/155845?ContentTypeID=1</link><pubDate>Tue, 09 Oct 2012 08:45:41 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:fafb424d-3fc2-4c17-8df9-2ef445cbfd6a</guid><dc:creator>AMIT KULKARNI</dc:creator><description>&lt;p&gt;&lt;p&gt;
ok ok:)&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/155564?ContentTypeID=1</link><pubDate>Tue, 09 Oct 2012 08:11:17 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:fa62c4f8-d2df-403e-a0ec-7992e23d4038</guid><dc:creator>&amp;#178;erik malund</dc:creator><description>&lt;p&gt;&lt;p&gt;
no u getting me in the wrong way..:o&lt;br /&gt;
that is between you and micro (u)&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;in previous comments i had got a reply that &amp;quot;u should choose
the microcontroller better than the one u have chosen..&amp;quot;&lt;/i&gt;&lt;br /&gt;
&lt;b&gt;NO, YOU DID NOT&lt;/b&gt;, the responders here so not use &lt;b&gt;S&lt;/b&gt;tupid
&lt;b&gt;M&lt;/b&gt;onkey &lt;b&gt;S&lt;/b&gt;hit, you got&lt;br /&gt;
&lt;b&gt;You&lt;/b&gt; should choose the microcontroller better than the one
&lt;b&gt;you&lt;/b&gt; have chosen.&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;thats why i am asking...&lt;/i&gt;&lt;br /&gt;
I can&amp;#39;t tell &lt;i&gt;what is the problem with 89c51re2??&lt;/i&gt; without
reading the dayasheet, do that yourself. The requirements were
revealed to you above.&lt;/p&gt;

&lt;p&gt;
Erik&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/155225?ContentTypeID=1</link><pubDate>Tue, 09 Oct 2012 07:09:29 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:eced05f5-eb5a-47fa-ac46-9cc903e8dc5e</guid><dc:creator>AMIT KULKARNI</dc:creator><description>&lt;p&gt;&lt;p&gt;
no u getting me in the wrong way..:o&lt;br /&gt;
in previous comments i had got a reply that &amp;quot;u should choose the
microcontroller better than the one u have chosen..&amp;quot;&lt;br /&gt;
thats why i am asking...&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/154813?ContentTypeID=1</link><pubDate>Tue, 09 Oct 2012 06:46:55 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:0fa47882-b8ba-42e8-a4bb-2eede77ecee7</guid><dc:creator>&amp;#178;erik malund</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;i&gt;what is the problem with 89c51re2??&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
Read rhe datasheet, maybe there is a &amp;#39;problem&amp;#39;, maybe not.&lt;/p&gt;

&lt;p&gt;
If you want me to read the datsheet for you, send me a check.&lt;/p&gt;

&lt;p&gt;
Erik&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/154305?ContentTypeID=1</link><pubDate>Sat, 06 Oct 2012 07:40:14 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:c319cb20-5739-41b8-981c-d1650bba4467</guid><dc:creator>AMIT KULKARNI</dc:creator><description>&lt;p&gt;&lt;p&gt;
yeah i agree:)&lt;/p&gt;

&lt;p&gt;
what is the problem with 89c51re2??&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/155228?ContentTypeID=1</link><pubDate>Fri, 05 Oct 2012 08:50:20 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:e4be636e-6a19-41e0-a284-dcbcb653ebf1</guid><dc:creator>&amp;#178;erik malund</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;i&gt;Is that a new alias you got mr Malund?&lt;/i&gt;&lt;br /&gt;
Nope, sometimes the wonderful product from Mr. Gates land up in
strange places when returning to a window.&lt;/p&gt;

&lt;p&gt;
fixed&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;a serial port for trace output can be invaluable anyway&lt;/i&gt;&lt;br /&gt;
I have had more trouble than benefit from printf cebugging, it
creates havoc on the timing. I have no doubt that thise that are more
into &amp;#39;processing&amp;#39; that I/O can find some value.&lt;/p&gt;

&lt;p&gt;
Erik&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/154814?ContentTypeID=1</link><pubDate>Fri, 05 Oct 2012 08:30:52 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:f0ab001b-18fe-4dd1-9905-57bc89620049</guid><dc:creator>ImPer Westermark</dc:creator><description>&lt;p&gt;&lt;p&gt;
Is that a new alias you got mr Malund?&lt;/p&gt;

&lt;p&gt;
By the way - JTAG is nice. But a serial port for trace output can
be invaluable anyway.&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/154304?ContentTypeID=1</link><pubDate>Fri, 05 Oct 2012 08:24:03 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:16abfb0e-cade-4130-b71d-fac5ecc08127</guid><dc:creator>&amp;#178;erik malund</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;i&gt;... UARTs ...., you should have another free for debug
purposes.&lt;/i&gt;&lt;br /&gt;
unless you are smart and get a chip with JTAG debug&lt;/p&gt;

&lt;p&gt;
Erik&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/153720?ContentTypeID=1</link><pubDate>Fri, 05 Oct 2012 07:56:47 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:998934de-eb44-4029-89f8-1699e462cea7</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
I would strongly suggest that you get a chip with &lt;b&gt;&lt;i&gt;at
least&lt;/i&gt; two&lt;/b&gt; UARTs - since one will be occupied by the GSM, you
should have another free for debug purposes.&lt;/p&gt;

&lt;p&gt;
(The parametric search lists 104 with I2C + 2 UARTs)&lt;/p&gt;

&lt;p&gt;
And, if you&amp;#39;re considering adding GPS at a later date (which is a
very common next step), then get a chip with at least 3 UARTs...&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/153033?ContentTypeID=1</link><pubDate>Fri, 05 Oct 2012 07:51:26 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:ca273673-6b08-40f2-83c1-f8eab7144aa6</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;b&gt;&lt;br /&gt;
Here: &lt;a href="http://www.keil.com/dd/search_parm.asp"&gt;http://www.keil.com/dd/search_parm.asp&lt;/a&gt;&lt;br /&gt;
&lt;/b&gt;&lt;/p&gt;

&lt;p&gt;
It&amp;#39;s pretty well hidden these days, but I found it here: &lt;a href="http://www.keil.com/c51/chips.asp"&gt;http://www.keil.com/c51/chips.asp&lt;/a&gt;&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/148276?ContentTypeID=1</link><pubDate>Fri, 05 Oct 2012 07:26:02 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:7cc06bd9-f108-4eb1-b840-9d82879d0890</guid><dc:creator>AMIT KULKARNI</dc:creator><description>&lt;p&gt;&lt;p&gt;
okay:)&lt;/p&gt;

&lt;p&gt;
but there are many chips and most of them are having some extra
functionalities :o&lt;/p&gt;

&lt;p&gt;
can you please tell me which will be best suited for my
requirements??&lt;/p&gt;

&lt;p&gt;
i.e. it should support I2C, 1 UART for GSM modem.. and 8051
features..&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/147833?ContentTypeID=1</link><pubDate>Thu, 04 Oct 2012 07:51:44 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:3c9073f5-0bf1-4d66-91f3-554ab2af3acf</guid><dc:creator>&amp;#178;erik malund</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;i&gt;can you please suggest me a better one?&lt;/i&gt;&lt;br /&gt;
sure, but why limit it to one&lt;/p&gt;

&lt;p&gt;
basically any chip that has been introduced the last 3 or more
years from any &amp;#39;51 uC vendor (except AFAIK Arghmel)&lt;br /&gt;
SILabs, NXP, ....&lt;/p&gt;

&lt;p&gt;
Erik&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/146927?ContentTypeID=1</link><pubDate>Thu, 04 Oct 2012 06:45:36 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:31b20593-7761-4518-9f84-eee0949f881d</guid><dc:creator>AMIT KULKARNI</dc:creator><description>&lt;p&gt;&lt;p&gt;
ohk :)&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;a better chip than the one you have chosen&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
can you please suggest me a better one?&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/145411?ContentTypeID=1</link><pubDate>Wed, 03 Oct 2012 08:46:35 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:4b2c37cf-da7a-4af0-887a-41161e9e8d19</guid><dc:creator>&amp;#178;erik malund</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;i&gt;Here EEPROM is connected to Rx-Tx pins.. :o&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
in a way yes, but actually no&lt;/p&gt;

&lt;p&gt;
the pins, in this case are not used as Rx and Tx, but as regular
port pins.&lt;/p&gt;

&lt;p&gt;
connect your EEPROM to two other pins, preferably those used for
hardware I&amp;sup2;C by a better chip than the one you have chosen.
Based on the impression of your abilities your confusion gives me, I
will not recommend that you tackle bit-banged I&amp;sup2;C&lt;/p&gt;

&lt;p&gt;
Erik&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/145409?ContentTypeID=1</link><pubDate>Wed, 03 Oct 2012 08:17:32 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:22baffc1-0c69-4d0e-afae-8f7cedce3c2b</guid><dc:creator>AMIT KULKARNI</dc:creator><description>&lt;p&gt;&lt;p&gt;
That link is just 1 part of my project.&lt;/p&gt;

&lt;p&gt;
In 2nd part i am going to interface a GSM modem to controller.
(Serially)..&lt;/p&gt;

&lt;p&gt;
So that Whenever bike exceeds a particular speed limit a message
will be sent to predefined number..&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: is this possible to use same serial port of 89s52 for different purposes?</title><link>https://community.arm.com/thread/143262?ContentTypeID=1</link><pubDate>Wed, 03 Oct 2012 08:01:13 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:5e4a6f45-a667-4e2c-9844-e29cfca4e29f</guid><dc:creator>AMIT KULKARNI</dc:creator><description>&lt;p&gt;&lt;p&gt;
ohk.. sorry!&lt;/p&gt;

&lt;p&gt;
Well.. This is the link which i was referring.&lt;/p&gt;

&lt;p&gt;
&lt;a target="_blank" href="http://www.electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=482&amp;amp;id=4676"&gt;www.electronicsforu.com/.../view_article.asp&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;
Here EEPROM is connected to Rx-Tx pins.. :o&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>