How To Understand µ-controller - Electronic Circuits Projects Diagrams Free

usmanfaisal · 27th October 2009, 09:46 PM

hi
i want to understand the number of microcontrollers.
for example "89c51"
what does 'c' stands for?
what is '89'?
what is '51'?
can anyone tell me details about it?
i'll be grateful.
regards
USMAN

Papabravo · 28th October 2009, 01:41 AM

All of the early 8 bit Intel processors began with two digits in the range 80-89. The "c" is for CMOS in contrast to the earlier version which were NMOS. The 51 is an architecture variant, but the set of variants does not fill up the entire range of 00-99. The 8-bit variants I am aware of include

8008, 8041, 8048, 8051, 8080, 8085, 8086, 8088

There may be others, but I'm not aware of them.

Sceadwian · 28th October 2009, 03:15 AM

The numbers are vendor dependent, and don't always make sense.

usmanfaisal · 2nd November 2009, 08:46 AM

Thanx Alot for the help
if there is any other alphabet instead of "c"?then what does that mean?

rushi53 · 2nd November 2009, 09:01 AM

Quote:

Originally Posted by usmanfaisal

Thanx Alot for the help
if there is any other alphabet instead of "c"?then what does that mean?

Yes, there is a series with S, which has ICs like 89s51, 89s52...
this series have ISP, which means in system programmable.

usmanfaisal · 2nd November 2009, 05:29 PM

i have read the data sheet of 89c51.it has 4k/8k/16k of flash.what is that?

rushi53 · 3rd November 2009, 05:54 AM

Quote:

Originally Posted by usmanfaisal

i have read the data sheet of 89c51.it has 4k/8k/16k of flash.what is that?

It is a program memory size. 89c51 has 4kBytes of program memory and 89c52 has 8kBytes of program memory.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar
Title	Starter	Forum	Replies	Latest
need to understand!	watzmann	Micro Controllers	6	16th October 2007 04:15 PM
help me understand this	cooltechfreak	Electronic Projects Design/Ideas/Reviews	7	15th November 2006 07:01 PM
how to understand this code!!!	indie	Electronic Projects Design/Ideas/Reviews	3	11th September 2004 08:39 PM
help me to understand this	imgemini	Electronic Projects Design/Ideas/Reviews	13	29th August 2004 01:25 PM
can u help me to understand	imgemini	General Electronics Chat	0	31st July 2004 10:08 PM

27th October 2009, 09:46 PM	#1
usmanfaisal	How To Understand µ-controller hi i want to understand the number of microcontrollers. for example "89c51" what does 'c' stands for? what is '89'? what is '51'? can anyone tell me details about it? i'll be grateful. regards USMAN

28th October 2009, 01:41 AM	#2
Papabravo	All of the early 8 bit Intel processors began with two digits in the range 80-89. The "c" is for CMOS in contrast to the earlier version which were NMOS. The 51 is an architecture variant, but the set of variants does not fill up the entire range of 00-99. The 8-bit variants I am aware of include 8008, 8041, 8048, 8051, 8080, 8085, 8086, 8088 There may be others, but I'm not aware of them. __________________ We never have time to do it right; but we always have time to do it over. Last edited by Papabravo; 28th October 2009 at 01:41 AM.

28th October 2009, 03:15 AM	#3
Sceadwian	The numbers are vendor dependent, and don't always make sense. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."

2nd November 2009, 08:46 AM	#4
usmanfaisal	Thanx Alot for the help if there is any other alphabet instead of "c"?then what does that mean?

2nd November 2009, 05:29 PM	#6
usmanfaisal	i have read the data sheet of 89c51.it has 4k/8k/16k of flash.what is that?