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ADS1192, operating check points?

Other Parts Discussed in Thread: ADS1192

Hi! All.

It's a first time operating the ADS1192 for me.

 

My question is that I can not measure the voltage 2.42 V or 4.03 V on the pin 9 (VREFP).

From the datasheet on page 22, internal reference, 

the output of pin 9 (VREFP) must be the 2.42 v (CONFIG2.VREF_4V = 0) after the initial power-up,.

But I just have a 0.0 V on the  pin 9.

Is there a something wrong with ADS1192?

 

I'm a newbie, so any help would be most appreciated.

 

p.s.

Maybe, I think it's a related with above question.

Although I should measure the DRDY(pin 22) which is toggled after the initial power-up whatever register value,

but I can't see any signal just DC 3.3 V.

What is the check points with this trouble?