topic MPC5604P SPI configuration reg... in Other NXP Products

MPC5604P SPI configuration reg...

pavan_nagamalla — Fri, 08 Jul 2011 15:30:06 GMT

Hello All,

Presently I am working on MPC5604P SPI module. I want to select the slaves through DSPIO PCSx pins usin as GPIO.

Can somebody help me out on this.......

I tried enabling and disabling the CS before each transfer...

when I tried with 3 byte transfer, with the same procedure, the CS is active only for the first byte and remains HIGH for the rest eventhough I am making it LOW for the next byte.

Thanks,

Pavan.

Re: MPC5604P SPI configuration reg...

princefiroz — Fri, 08 Jul 2011 21:29:41 GMT

Hello pavan,

If the requirement is to make the CS pin high in between byte transfers, why to select it as a GPIO pin?

Its better to configiure the pin as DSPI0 pin the PCR register. In this way we dont have to make the CS pin high and low.

Regards

Firoz

Re: MPC5604P SPI configuration reg...

pavan_nagamalla — Mon, 11 Jul 2011 14:05:36 GMT

Hi Firoz,

Thanks for the response.

We can use the AUTO configuration mechanism with the internal registers. I tried this and working good. But it is mentioned that we can also use the CS0,CS1 etc.. as GPIO also. So, I am trying to make use of CS0 as GPIO and asserting it before the transfer. But facing the stated problem.

Thanks,

Pavan.