SD card hookup question

grindel · 2008-05-03 20:03

OK, I have qty 10 of the 10K ohm resistors in the house and I am trying to bread board up the SD card using an old floppy drive cable. if I had two more I could run two in series for each pull-up line to get teh 20K...that much I understand. Am I going to hurt anything by having the 10K ohm resistors instead of the 20K ohm resistors? I can't quite figure out if I can use some other resistor to supply all 6 of the 10K resistors and get the same effect?

Thanks all for your patience...I will continue reading online to see if I can figure this out myself.

Oldbitcollector (Jeff) · 2008-05-03 20:11

I've personally hooked up the Propeller to SD without resistors and have
had it work fine. (Take a look at the Cookbook link below)

On the other hand, I suspect that 10K resistors would be just fine too,
and in fact my first design incorporated back-to-back 10K resistors
to obtain the 20K value.

OBC

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
New to the Propeller?

Getting started with the Protoboard? - Propeller Cookbook 1.4
Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
Got an SD card? - PropDOS
A Living Propeller FAQ - The Propeller Wiki
(Got the Knowledge? Got a Moment? Add something today!)

Matthew Hay · 2008-05-03 21:57

That appears to be all that SpinStudio card uses is 10k resistors

http://ucontroller.com/documentation/SDCardDoc.html

grindel · 2008-05-04 00:41

thanks for the help. Success! I was trying to wire off the diagram from the FAT16 routines with secure digital card layer from the object exchange. It says to wire it as such:

'              &#61463; &#61463; &#61463; &#61463; &#61463; &#61463;
'              &#61628; &#61628; &#61628; &#61628; &#61628; &#61628; 20k
'   p0 &#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9531;&#9472;&#9532;&#9472;&#9532;&#9472;&#9532;&#9472;&#9532;&#9472;&#9532;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472; do
'   p1 &#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9531;&#9472;&#9532;&#9472;&#9532;&#9472;&#9532;&#9472;&#9532;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472; clk
'   p2 &#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9531;&#9472;&#9532;&#9472;&#9532;&#9472;&#9532;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472; di
'   p3 &#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472;&#9531;&#9472;&#9532;&#9472;&#9532;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472; cs (dat3)
'         150          &#9492;&#9472;&#9532;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472; irq (dat1)
'                        &#9492;&#9472;&#9472;&#9472;&#9472;&#9472;&#9472; p9 (dat2)

I just wired it off instruction on oldbitcollector's page. (a wonderful resource)

Awesome.

Now i need more than one keyboard so I don't have to keep switching b/w computers hehehehe.

Oldbitcollector (Jeff) · 2008-05-05 04:47

Glad you are up and running! Hit the local thrift/secondhand store for a keyboard.
(They always have them around her for $1.00 [noparse]:)[/noparse]

Then give PropDOS or PropBASH a "spin" -- SD is one of the neatest addons yet.

OBC

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
New to the Propeller?

Getting started with the Protoboard? - Propeller Cookbook 1.4
Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
Got an SD card? - PropDOS
Need a part? Got spare electronics? - The Electronics Exchange

SD card hookup question

Comments