Freescale Semiconductor MPC8313E Family Reference Manual page 561

Enhanced Local Bus Controller
If a UPM device has OE, it should not be asserted in the same RAM word as the TA signal. If OE and TA
are both asserted in the same RAM word, then the eLBC may not be able to sample the correct data during
reads. Therefore OE must be asserted earlier than TA.
MPC8313E PowerQUICC II Pro Integrated Processor Family Reference Manual, Rev. 3
Freescale Semiconductor 10-107