AM2432: PRU-ICSS EtherCAT SubDevice Firmware Constraints

Tool/software:

Hello,

May I have question about Industorial-SDK for AM243x?

My customer using 3P stack and PRU-ICSSG EtherCAT driver (from ind-SDK).

Question 1

In SDK manual, it say there is 59kB of RAMs.

Is this same mean of RAM as ET1100's DPRAM?

https://software-dl.ti.com/processor-industrial-sw/esd/ind_comms_sdk/am243x/09_02_00_08/docs/api_guide_am243x/ETHERCAT_SUBDEVICE_FWHAL.html 

https://www.beckhoff.com/ja-jp/products/i-o/ethercat-development-products/elxxxx-etxxxx-fbxxxx-hardware/et1100.html? 

Question2

if Q1 is correct, 

Can we use fully 59kB of RAM though ind-SDK's PRU-ICSSG EtherCAT driver?

Or is there anything to limit or constraints?

Question 3

How long is maximum packet of ethernet frame in my enviorment?

Or number of max frame is define EtherCAT stack (in R5F) side? PRU-ICSSG hardware and driver in ind-sdk have not constraints of frame size?

Thanks,

GR