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USB-6501 output structure

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Figure 4 of the NI USB-6501 OEM User Guide shows a port IO circuit.  Rp is populated with a 4.7 kOhm pull up resistor.  The documentation states an output can be configured as push-pull.  Does that indicate that actual micropin on the USB microcontroller, as shown in Figure 3 block diagram, will be configured as push-pull, basically overriding the pull up / open drain circuit?  Is there circuit diagram of what an actual port pad looks like?  That is, when push-pull, does the port pad have a dual transistor circuit connected to it?  

 

Reviewing the PCB, I observe a low side transistor on all the pins with the 4.7 kOhm pull up resistor, Rp.

 

Thank you. 


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