Last visit was: Sat Sep 18, 2021 12:06 am
It is currently Sat Sep 18, 2021 12:06 am



 [ 3 posts ] 
 PSoC4 6800/6500/Intel bus interface 
Author Message

Joined: Tue Dec 11, 2012 3:41 am
Posts: 68
I needed a way to add classic I/O interfaces to my desktop PC, so I built a module that connects to usb, and has a classic bus interface on the other side. It uses a PSoC4 and its integrated digital blocks to generate the logic to drive the bus. The current version requires a two phase clock generator, so I used the MC6875.

http://hackaday.io/project/1937

I'll later post the entire project.


Wed Sep 03, 2014 11:34 pm

Joined: Wed Jan 09, 2013 6:54 pm
Posts: 1632
You're running at 5V I suppose? So the bus you expose looks very much like an 8-bit micro bus. The idea is to be able to hook up 8-bit peripherals - but not to drive any I/Os directly? I see your block diagram shows a 6522 for I/O.

The PSoC4 looks interesting - 16MHz ARM core with up to 20 GPIOs and operating up to 5V. (Also 24MHz and 48MHz available.) And the dev boards are just $4.
http://uk.mouser.com/new/Cypress-Semico ... -049-kits/


Thu Sep 04, 2014 5:56 am

Joined: Tue Dec 11, 2012 3:41 am
Posts: 68
Yes, 5V, and the bus timing match that of 65/68xx series micro, but I also added an extra WR signal, so that it can interface even with Intel peripherals. Due to the lack of i/o ports, the bus has only a 8 bit address space. The beauty of the psoc is that once i set up this system, in the mcu code I just need to set the address register, data(if writing), and activate the transfer. The timing is completely controlled by the logic.


Thu Sep 04, 2014 7:44 pm
 [ 3 posts ] 

Who is online

Users browsing this forum: AhrefsBot, CCBot and 0 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group
Designed by ST Software