--------------------------------
c) set the Previous Write Data Length state machine variable to the Requested Write Data Length
Xfer_Rdy state machine argument.
--------------------------------

-------------------------------- second last para in section 9.2.6.2.2.3, Page#460

If this state machine receives an ACK Transmitted confirmation for an XFER_RDY frame, then this state
machine shall send an XFER_RDY Arrived message to ST_ITS state machine specified by the tag. The
message shall include the following Xfer_Rdy arguments:
a) retry data frames;
b) retransmit bit;
c) target port transfer tag;
d) requested offset; and
e) write data length

-------------------------------- second last para in section 9.2.6.2.2.3