8051 S series vs C series

[glenndr_15]

What is the difference between the s series vs the c series?

[samir]

in atmel one
one diff is S series can be programed using low volatge in system programing method so only six pin header is req to program chip onboard

[microkid]

There are some other differences too

For example voltage rating is different for 'S' series

Mostly minor improvements added

Checkout the datasheet for more accurate differences

MicroKid

[ali_asadzadeh]

as others said it can be programmed in system and it also have watchdog and a second DPTR.

[chyun3]

C series need high voltage parallel programming to burn in the hex code...not recommend...better go for the S series that support ISP...

[avrPassion]

I have heard  that the protocol of ISP in the S series of 8051 is the same as ISP protocol that is used by the AVR chips. I have AVRISP programmer and the schematic file of it. I can post the pcb file of the AVRISP programmers too. Can we use AVRISP programmer to program the S series of 8051? what software should we use?

[glenndr_15]

can I use the source code or hex file of the C series for S series? or vice versa?

[avrPassion]

Yes, you can

[pak]

I have heard  that the protocol of ISP in the S series of 8051 is the same as ISP protocol that is used by the AVR chips. I have AVRISP programmer and the schematic file of it. I can post the pcb file of the AVRISP programmers too. Can we use AVRISP programmer to program the S series of 8051?

I tried both AT89S53 and  ATMega8 with ISP programmer for http://www.lancos.com/prog.html .It's working   

for more detail, you may check it out that site. It has hardware and software programmer.
All you need to change is the reset pin polarity.

pak

Happy Microcontroller programming

[oscareev]

The big difference between 89C and 89S is the SPI port, besides its programming.

La gran diferencia entre 89C y 89S es el puerto SPI, ademas su programacion.

regards

cali - colombia

[technovm]

if a capacitor 0.1uf is connected to port of 89S51, which is connected to a key, key will not work. whereas it works with 89C51

[metal]

Strange finding, can you explain why?

[technovm]

Strange finding, can you explain why?

I could not find out why. I have searched in many forums for the answer.

[rentau]

.1uF doesn't matter at all IMHO, also you should consider what port,pin your using, if they have internal pull-up or not, or any shared I/O

[technovm]

i have connected key to port 1.7 of 89s52, with a pull up resistor of 3.3k and 0.1uf capacitro to ground. The key does not work. If i replace 89s52 with 89c52 the key functions as desired.

[microkid]

There may be some problem with your code. Check out the code again.

[technovm]

there is no problem with the code. If i cut off the capacitor the code works or if i replace 89S52 with 89C52 the same code works.

[microkid]

In 89S52 the pin P1.7 has extra operation(i.e. used as clock pin for ISP) compared to 89c52 which may be the cause.

[Rony]

there is no problem with the code. If i cut off the capacitor the code works or if i replace 89S52 with 89C52 the same code works.

I feel the DC level maintains at pin because of cap

[technovm]

I feel the DC level maintains at pin because of cap

But if I use the same with 89C52 it works. So there is some difference in the two IC's(89C52 and 89S52) which is not mentioned in the datasheet, though they say they are same, besides the low voltage programming.