check this link
http://www.dnatechindia.com/index.php/Tutorials/8051-Tutorial/Interfacing-ADC0808-To-8051.html
can we replace AT89c51 by AT89s52 but i have c51 code
AT89S52 is a microcontroller based on the Intel 8051 architecture and features. Concerning your question, AT89S52 is the heart of most project involving Dual Tone Multi Frequency (DTMF), that is to say it is the controller IC used in such project.
To limit the amount of current to the ports
Graphical User Interface
Its an interface.
yes
Short answer is yes. It does require some interface circuitry, which can be found at www.8052.com
The Atmel AT89S52 is a microcontroller in the 80C51 family.
can we replace AT89c51 by AT89s52 but i have c51 code
semi conductor
32
Its an I\O controller
AT89S52 is a microcontroller based on the Intel 8051 architecture and features. Concerning your question, AT89S52 is the heart of most project involving Dual Tone Multi Frequency (DTMF), that is to say it is the controller IC used in such project.
S stands for SEMI CONDUCTOR
To limit the amount of current to the ports
AT - Atmel , 89 - manufacturer's series , S - silicon CMOS , 52 - is the family of 8051 i.e., 8052 MC .
Gigabit Ethernet interface Controller interface Serial interface Multilink Group interface MFR (Multilink Frame Relay bundle interface) Dialer interface Loopback interface Tunnel interface ATM interface