RE: [avr-gcc-list] SPI Interfacing

[Frank Van Hooft]

A quick look at your datasheet appears to me that your ltc2413
only outputs data on its SPI port. Which is why it only has 3 
of the 4 SPI pins. It seems to me you might consider:

ltc2413     mega128
===================
sck         sck
sdo         miso
cs          ss

You won't use the mosi pin on the mega128 because you can't
transmit data to the ltc2413; you can only receive data from it.
(This assumes you make the mega128 be the SPI bus master.)

Just a thought. I suggest you go through the datasheet with some
care. But this is what it looks like after a 20-second glance to me.

Kind regards,

Frank.

http://www.frankvh.com/mp3player



-----Original Message-----
From: address@hidden
[mailto:address@hidden Behalf Of Torsten Hahn
Sent: Wednesday, December 31, 2003 3:30 AM
To: address@hidden
Subject: [avr-gcc-list] SPI Interfacing


Hi all,

i have to add an ltc2413 a-d-converter to an atmega128 based system. 
The problem is, that the ltc2413 has an bit "strange" serial interface. 
The datasheet says it is spi-compatible. But there are only an SCK, SDO 
and an CS pin avaiable. But if i understand the mega128 datasheet 
right, there are the pins MOSI, MISO, SCK, and SS needed for an spi 
interface.
How do i have to connect the mega128 to the ltc2413 ?

(I put the datasheet for the ltc2413 at 
http://www.geo.tu-freiberg.de/~hahn/2413f.pdf )

Thanks for help!
Torsten.


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