Have you pulled up the IIC pin #8
|
Have you pulled up the IIC pin #8
If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
.
Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants - but debt is the money of slaves
.
There simply is no "Happy Spam" If you do it you will disappear from this forum.
|
It does not have a resistor on it, but "IIC" on the NS73M Board is tied to +3.3v, yes.
Both the I2C Clock and Data lines are pulled to +3.3v with 1Kohm resistors. I have tried larger values, and it makes no difference.
cheers!
SmugWimp
Last edited by SmugWimp; - 8th February 2009 at 12:27.
|
XT_OSC might be better for a 4MHz crystal, and BODEN_OFF would help when operating
below the Brown-Out Reset Voltage, but I think the primary show-stopper is trying to run
the non LF version 877A below the minimum operating voltage.
The LF part can operate on 2 to 5.5V. The non LF needs 4 to 5.5V. Check the Electrical
Specifications section in your datasheet.
Brown-Out reset on the non LF part can be anywhere from 3.65V, 4.0V or 4.35V.
|
Bruce,
Thanks for the info. Hadn't thought of that.
I did a slight rewire to provide +5v to LCD and 877a, and +3.3v to NS73M only.
The 1K Pull up resistors for I2 Data/Clock are also at +5v.
XT_OSC and BODEN_OFF have been implemented on my fuses.
However, still no success.
I appreciate everyone's support and suggestions!! I will keep plugging away. Gotta be me... something...
Cheers!
SmugWimp
Last edited by SmugWimp; - 9th February 2009 at 07:37.
|
Run the PIC at 5V and just build this simple interface circuit shown in section 2.3.
http://www.standardics.nxp.com/suppo...df/an97055.pdf
|
Bruce,
Cool!!! Funny, I saw this circuit at Mike Yancy's Website while snooping around for stuff. I thought it was because he was running an Arduino. Guess that points out more ignorance on my part!
I'll have to run into Akihabara to get these parts; nothing like that in my stock. I'll let you know what I find, but I really really appreciate the heads up on this!!
Cheers!
SmugWimp
Members who have read this thread : 0You do not have permission to view the list of names.
Posting Permissions
Bookmarks