Problems driving the chip select pin PCS0 on SPI interface

We are migrating our application to use PicoCOM4 as a replacement of the PicoCOM2.

Our application works with the PicoCOM2 modul as expected.

Testing the same application on the PicoCOM4 the SPI-interface does not operate the chip select pin (PIN29 =PCS0) of the SPI-bus interface.
The SPI-driver version is V2.5, the Hardware version is V1.3

According to the documentation

Quote

Native SPI Support Version 1.3 (2011-11-14) page 11

pin 29 should be driven by the SPI-driver.
But looking into the documentation

Quote

PicoCOM Device Driver Version V1.2 (2012-01-24) page 8

pin 29 is capable as a input terminal only. This contradicts with the information in SPI-driver documentation.

What can I do to make the pin 29 (PCS0) work?
Is there an error in the documentation?

here is my SPI configuration:

There was an entry

in the SPIController0 setting using the PicoCOM2, that activaded the chip select function.

Where is it controlled now? The above documentation does not reference to such an option.
Can I access /drive pin 29 (PCS0)?

Regards Jörg

Hai there,

I have tried the setting

with no success. The PCS0 line stays at zero. I would expect it to be high and getting active low.

Can you reconstruct the behavior I am observing?

What is about the documentation content in the PicoCOM device driver V1.2 page 8?
It says pin 29 is an input.
Can this be the reason that it not works?