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Hy,

I'm newbie here and some weeks ago I had the same problem with IA4420. The problem was with the nSEL, because I use an AT MEGA8 and it has a 8 bit SPI and the IA4420 uses 16bit, and I switched the nSEL to high after 8 bit but it need to switch to high after 16bit, and the nSEL high state initializes the execution of the command.

You can check SPI bus functionally with Power Management Command. (p13 in datasheet) The bit dc(LSB) is used to switch the pin8 on/off, basically it is on and you can measure a square wave at 1MHz on pin 8. If the SPI works correctly and you send for example a command 0x8219 the pin 8 is switched off, otherwise it isn't.

Hence I had some other problem, I use synchron pattern recognition, and after I send it on the transmitter side and I send some data , I get an interrupt on the receiver side, but I can not read out a valid data.
Had somebody got this problem?

Regards,

Zoli
r...@gmail.com



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