All times are UTC-06:00




Post new topic  Reply to topic  [ 2 posts ] 
Author Message
PostPosted: Thu Feb 17, 2011 7:03 am 
Offline

Joined: Wed Mar 08, 2006 2:28 am
Posts: 24
Location: Ireland
Hi,

I have desinged an interface board to connect a VFD display and IR sensor to Efika. I want to use PC6 in UART mode to control the interface board. Could someone please confirm pinout of PC6:

1 +3.3V Power
2 n/c Not connected
3 RXC Data received
4 GND System GND
5 TXC Data transmit

I used an IC from TI for voltage level translation between 3.3v and 5v for RXC and TXC lines. I also put 1k resitors on these lines, as Neko suggested in another topic. Is there anything else I should think off?

One more question: I want to switch on Efika with a transistor placed between pins of PS connector. Is it ok to do so?

Schematic: http://img155.imageshack.us/i/efikavfdsch.png/
PCB: http://img573.imageshack.us/i/efikavfdpcb.png/


Top
   
PostPosted: Fri Feb 18, 2011 3:14 am 
Offline
Site Admin

Joined: Fri Sep 24, 2004 1:39 am
Posts: 1589
Location: Austin, TX
Quote:
Hi,

I have desinged an interface board to connect a VFD display and IR sensor to Efika. I want to use PC6 in UART mode to control the interface board. Could someone please confirm pinout of PC6:

1 +3.3V Power
2 n/c Not connected
3 RXC Data received
4 GND System GND
5 TXC Data transmit

I used an IC from TI for voltage level translation between 3.3v and 5v for RXC and TXC lines. I also put 1k resitors on these lines, as Neko suggested in another topic. Is there anything else I should think off?

One more question: I want to switch on Efika with a transistor placed between pins of PS connector. Is it ok to do so?

Schematic: http://img155.imageshack.us/i/efikavfdsch.png/
PCB: http://img573.imageshack.us/i/efikavfdpcb.png/
All should be fine; the pinout is fine. The chip is fine. Resistors are a good idea.

Switching the power connector of the Efika with a transistor should be okay but be careful. One wrong move and you could blow it up.. but it should be fine, you know what you are doing :)

Someone with better experience of this kind of hardware would probably be better to answer you, but from my point of view (this level of electronics and a vague recollection of how the Efika PPC went..) it all seems good.

_________________
Matt Sealey


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 2 posts ] 

All times are UTC-06:00


Who is online

Users browsing this forum: No registered users and 3 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

Search for:
Jump to:  
cron
PowerDeveloper.org: Copyright © 2004-2012, Genesi USA, Inc. The Power Architecture and Power.org wordmarks and the Power and Power.org logos and related marks are trademarks and service marks licensed by Power.org.
All other names and trademarks used are property of their respective owners. Privacy Policy
Powered by phpBB® Forum Software © phpBB Group