PXD10RM Datasheet, PDF (281/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

If the new requesting master’s priority level is higher than that of the master that currently has control of
the slave port, the higher priority master is granted control at the termination of any currently pending
access, assuming the pending transfer is not part of a burst transfer.
A new requesting master must wait until the end of the fixed-length burst transfer, before it is granted
control of the slave port. But if the new requesting master’s priority level is lower than that of the master
that currently has control of the slave port, the new requesting master is forced to wait until the master that
currently has control of the slave port is finished accessing the current slave port.
10.6.6.1.1 Parking
If no master is currently requesting the slave port, the slave port is parked. The slave port parks always to
the last master (park-on-last). When parked on the last master, the slave port is passing that master’s signals
through to the slave bus. When the master accesses the slave port again, no other arbitration penalties are
incurred except that a one clock arbitration penalty is incurred for each access request to the slave port
made by another master port. All other masters pay a one clock penalty.
Freescale Semiconductor
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
10-5