64 hardware interrupts

I am making a project which requires 64 hardware interrupts. Please suggest me some ICs that can be used collectively to get 64 interrupts..

you can use the most common IC 8259. you can simply cascade it to get 64 vectored interrupts. You can use your digital engineering book for more information on 8259 and how to cascade them.
I am not sure if you'll be able to find a single IC for 64 interrupts... and if you are able to find it please share it with us...! :-)

many thanx for ur reply. i thought of 8259, but thn i wud require 8 slaves and 1 master..i.e 9 ICs..n tht wud make d entire circuitry too bulky...i found this IC 80293AA with 24 interrupts..do u have any ebook relating that

thats really great.. thank you for information... also.. i recommend you to go through the datasheet of the IC. that is the best source of information you need for any IC. you can start working on this IC and if you feel any problem we can try solving it together..

Do u have a ckt to program 89s52 microcontroller with USB interfacing...i hv 1 but with RS232 interfacing..

you can make use of FT232 IC, bridges RS232 to USB. look for the datasheet for more information. Its the best available in the market these days

and regarding programming, i can say is make use of a bootloader and a custom designed program which send program data to controller through the USB port (which is connected to controller's RS232 via FT232) As such i do not have a circuit with me.

hi arian 64 interrupts sounds really interesting,if the application is of higher level better go for arm LPC2378
any pin on PORT0 and PORT2 (total of 46 pins) providing a digital function
can be programmed to generate an interrupt on a rising edge, a falling edge, or both. The
edge detection is asynchronous, so it may operate when clocks are not present
in addition The ARM processor core has two interrupt inputs called Interrupt Request (IRQ) and Fast
Interrupt Request (FIQ). The VIC takes 32 interrupt request inputs which can be
programmed as FIQ or vectored IRQ types. The programmable assignment scheme
means that priorities of interrupts from the various peripherals can be dynamically
assigned and adjusted.
I hope it will be usefull.

junied said :

The ARM processor core has two interrupt inputs called Interrupt Request (IRQ) and Fast
Interrupt Request (FIQ). The VIC takes 32 interrupt request inputs which can be
programmed as FIQ or vectored IRQ types

yes and it will also save u additional circuit.......
but first make ur self ether u want gpio interrupts only , or a combination of more than one type of interrupts....

if u want only gpio interrupts i wont recommend u for arm ...
instead go for IC 80293AA as u said...
:-)

well.. i think he might have finished or about to finish with the application he decided coz the first four posts are about a month old he he he...

He actually used the same thread (which is a good thing) to post his new problem
But thanks to both of you... really valuable information as i don't know much about ARM..

well now at least we know to see the dates of the post too.....
:mad