PXD10RM Datasheet, PDF (904/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

If instead the access is allowed, then the MPU simply passes all "original" AHB signals to the slave device.
In this case, from functionality point of view, the MPU is fully transparent.
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PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor