Discussion in "8051 Discussion Forum" started by    bastik    Jan 12, 2018.
Fri Jan 12 2018, 10:37 AM
I have device with SAB80C535 microcontroller and I was wondering if any one had a good substitute for this microcontroller? (which is of course still produced and can be bought)
Fri Jan 12 2018, 06:30 PM
What exactly is your situation ?
I very much doubt there is a drop in replacement.
If your are able to redesign the board
and write your own software there are several options.

There are several SAB 80535 on ebay, some from your country.

[ Edited Sat Jan 13 2018, 02:50 AM ]
Sat Jan 13 2018, 09:38 PM
For now I don’t have much information about device in which this microcontroller is installed. My task is to replace SAB80C535 with a newer microcontroller that is currently being manufactured. It is obvious that the board will have to be redesigned. I know that my answer contains not much information, unfortunately I do not know much more about this device. I just got the task of replacing the microcontroller with something newer. From what I know the device is equipped with external memory (Am27C256, SRM2264LCT), counter (PD71054) and 8-Bit ADC converter. The program was probably written in assembly language. So I assume that the new microcontroller should be popular, cheap and 8 bit.
Sat Jan 13 2018, 10:26 PM
This is clearly an old design.
A modern microcontroller will almost certainly combine
the controller ,Am27C256, SRM2264LCT, PD71054
and ADC converter into one chip.

There are MANY devices from several families that could do this cheaply.

If you have the original software you can find out what it did,
and think about how to reproduce it.

Whoever gave you the job, will have to give you all the information,
before you can do anything.
Sat Feb 03 2018, 10:40 PM
It took me a several days to find original software Unfortunately, the person who programmed the old microcontroller has left the company and there is nobody else who could advise me anything. I am only an intern with little experience gained while doing student projects and I am afraid that I will choose the wrong microcontroller.
Based on the code, I can say that it is used 20 I \ O microcontroller lines, 9 interrupt sources (7 external and two from peripherals: timer 0 and timer 2) and 3 A/D converter (two external) . What else do I have to pay attention to when selecting a microcontroller? As a replacement, I found the AT89C51AC3, but I do not know if it's a good choice. The device does not need to be upgraded with any new functions (of course, after replacing the processor it will be necessary to modify the software and the PCB) it is important that the new microcontroller is available on the market for the next few years.
Sun Feb 04 2018, 09:36 PM
The AT89C51AC3 or any replacement micro, may have the same functions,
but exactly how they work will be different.
The register addresses will almost certainly be different.

To make this work you will have to be sure you
understand the original code as well as the man that wrote it.
When you understand the code, you will be able to choose a replacement
and know what changes to make.

Fri Feb 09 2018, 05:29 PM
I have sent you a message.

Get Social


Powered by e107 Forum System


Wed Sep 12 2018, 10:58 PM
hii!! some1 please let me know how i ll get rfid code to 8051 by WEIGAND mode
Tue Sep 11 2018, 08:09 PM
is there anyone here?
Mon Aug 27 2018, 07:30 AM
Hello everyone!
Sat Jul 21 2018, 06:21 AM
Dibakar Bhanja Chowdhury
By using a 555 timer how can I expand the range of the mobile phone jammer? Please reply me asap
Sun May 20 2018, 10:01 AM
how to write and execute a program that read the keypad button and display the number on 7 segment on intel8051 at89s52 in assembly language?
Thu May 17 2018, 06:36 AM
sir iwant to ask about controller of three phase supply by using back to back thyristor instead of triac....will u give me some guideline?
Sat Apr 28 2018, 12:54 PM
ashutosh jain
IR Remote Switch using TV remote (RC5 Protocol) is not working properly. opp1 & opp2 is in problem.plz help
Fri Apr 27 2018, 08:09 PM
@kaiserslautern Post in forum
Wed Apr 25 2018, 07:09 AM
Hello everyone, using software uart is a very good idea for a second serial port. Thank you so much. I would kindly like to know how to connect this port to the PC?
Sat Apr 21 2018, 07:50 PM
This is a community site. Feel free to help anyone needing advice



Fri Sep 14 2018, 02:45 AM
Thu Sep 13 2018, 04:46 AM
Wed Sep 12 2018, 10:36 PM
Tue Sep 11 2018, 03:25 PM
Thu Sep 06 2018, 02:28 PM
Tue Sep 04 2018, 06:15 PM
Sun Sep 02 2018, 02:20 PM
Fri Aug 31 2018, 08:26 AM


Guests: 47, Members: 0 ...

most ever online: 182184
(Members: , Guests: 182184) on 06 Aug 2010: 05:37 AM

Members: 38006
Newest member: PCBindex
Forum Activity
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Sep 13 2018, 08:39 PM
First of all, by reading your reply, I abandoned m...
DrNossberg Avatar
Posted By DrNossberg
Thu Sep 13 2018, 03:49 PM
Hi, thanks you for your reply ^^ First of all, by ...
ExperimenterUK Avatar
Posted By ExperimenterUK
Wed Sep 12 2018, 12:12 AM
HiThere are several issues here.The original 8051 ...
DrNossberg Avatar
Posted By DrNossberg
Tue Sep 11 2018, 08:08 PM
Hello everybody!First of all let me explain some s...
ExperimenterUK Avatar
Posted By ExperimenterUK
Fri Sep 07 2018, 05:08 AM
The compiler thinks the micro doesn't have enough...
Sudhansudeep Avatar
Posted By Sudhansudeep
Fri Sep 07 2018, 02:59 AM
this is the build output message
Sudhansudeep Avatar
Posted By Sudhansudeep
Fri Sep 07 2018, 01:38 AM
Change the mobile number as [number removed] in t...
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Sep 06 2018, 08:56 PM
I don't know what the problem is, I get no errors....
Sudhansudeep Avatar
Posted By Sudhansudeep
Thu Sep 06 2018, 01:12 PM
the code is Attachment ...
Sudhansudeep Avatar
Posted By Sudhansudeep
Thu Sep 06 2018, 12:48 PM
the code is same as u sent me for 16 chars