8755A chip? : 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes

Forums

8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes :: Forums :: Discuss and Learn :: General help Guidance and Discussion		<< Previous thread \| Next thread >>
8755A chip?


Moderators: Ajay, Junied , abbas1707, Arun Kumar V, pdi33, Shailesh NAYAK, ۞ TPS ۞, shyam, sashijoseph

Author

Post

mynavy

Thu Apr 24 2008, 09:02PM

Registered Member #7314

Joined: Fri Apr 18 2008, 06:18PM

Posts: 6
Thanked 0 times in 0 posts

Hi all!

I was looking at the datasheet of the 8755 chip and i still cant understand how this chip works and what his main purpose in a circuit with a 8031 microcontroller.
I would be Thankful if somebody could help to understand it.
p.s
here's the data sheet: http://www.datasheet.in/download.php?id=45789

Ajay

Fri Apr 25 2008, 03:37AM

Rickey's World Admin

Registered Member #1

Joined: Fri Feb 24 2006, 04:56AM

Posts: 3745
Thanked 695 times in 654 posts

If you click on datasheet..
you will see this
"16/384-BIT EPROM WITH I/O"

It got 2K eeprom + 2 ports
8031 does not have internal rom so external ROM is needed for storing program.

www.rickeyworld.info
If you feel satisfied with the user's forum reply please click on the thank button.

Obey forum rules!
Respect others!

mynavy

Fri Apr 25 2008, 04:17PM

Registered Member #7314

Joined: Fri Apr 18 2008, 06:18PM

Posts: 6
Thanked 0 times in 0 posts

yeah i understood his architecture on the outside but how can i program the ports as inputs or outputs?
Thanks in advance!

Ajay

Sat Apr 26 2008, 02:26AM

Rickey's World Admin

Registered Member #1

Joined: Fri Feb 24 2006, 04:56AM

Posts: 3745
Thanked 695 times in 654 posts

go through datasheet once..

you will come to know.. If you still need help, Simply post..
But please go through datasheet carefully

www.rickeyworld.info
If you feel satisfied with the user's forum reply please click on the thank button.

Obey forum rules!
Respect others!

mynavy

Sat Apr 26 2008, 10:49PM

Registered Member #7314

Joined: Fri Apr 18 2008, 06:18PM

Posts: 6
Thanked 0 times in 0 posts

Thanks for the help!
I had read the data shit again and figure out that i need to program the ddr registers of ports a and b as inputs or outputs by giving them "0" as inputs and "1" as outputs but i came across a major problem...
I need to connect the 8755 chip to a zif socket as inputs and to connect to 8031 as outputs so the 8755 should be in the middle between the socket and the 8031.
so my big question is how i manage to program those ports a and b of the 8755 so that 8031 will check the component that connects on the zif socket?
Thanks!