No miso No mosi?


#1

How to connect SPI memory with 4 wire interface
since ther is No MISO No MOSI?


#2

Haven’t done this on my Q2501 before, but some other places.

Have a look e.g. at http://www.silabs.com/public/documents/tpub_doc/uguide/Microcontrollers/Interface/en/CP2120-EK.pdf

HTH,
Heinz


#3

i am sorry dear this is not the solution
i am looking for connection 4 wire spi with 3 wire spi


#4

Hi Kapilsinghi,

Please check my response to this post at the following location:
wavecom.com/modules/movie/sc … php?t=1187

Regards,
Open AT Fan.


#5

Sorry, Kapil, I should have written this in my first posting already:
Have a look on the circuitry round R14/J4 on pg6.
IMO R14 is used to weaken the MOSI port and therefore enabling the attachment of a three wired SPI subsystem.

As I wrote I haven’t used SPI on my Q2501 yet, just on a Q2686. But IIRC there is already a 4W-interface.

Heinz