MPC8536E-ANDROID Freescale Semiconductor, MPC8536E-ANDROID Datasheet - Page 1082
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MPC8536E-ANDROID
Manufacturer Part Number
MPC8536E-ANDROID
Description
HARDWARE/SOFTWARE ANDROID OS
Manufacturer
Freescale Semiconductor
Series
PowerQUICC ™r
Type
MPUr
Datasheets
1.MPC8536EBVTAVLA.pdf
(127 pages)
2.MPC8536EBVTAVLA.pdf
(2 pages)
3.MPC8536EBVTAVLA.pdf
(1706 pages)
Specifications of MPC8536E-ANDROID
Contents
Board
For Use With/related Products
MPC8536
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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PCI Bus Interface
it asserts PCI_STOP, indicating that the target can accept the current data, but no more data can be
transferred. For disconnect-without-data, the target asserts PCI_STOP when PCI_TRDY is negated
indicating that the target cannot accept any more data.
16.4.2.9
Fast Back-to-Back Transactions
The PCI bus allows fast back-to-back transactions by the same master. During a fast back-to-back
transaction, the initiator starts the next transaction immediately without an idle state. The last data phase
completes when PCI_FRAME is negated, and PCI_IRDY and PCI_TRDY are asserted. The current
master starts another transaction in the clock cycle immediately following the last data transfer for the
previous transaction.
Fast back-to-back transactions must avoid contention on the PCI_TRDY, PCI_DEVSEL, PCI_PERR, and
PCI_STOP signals. There are two types of fast back-to-back transactions—those that access the same
target and those that access multiple targets sequentially. The first type places the burden of avoiding
contention on the initiator; the second type places the burden of avoiding contention on all potential
targets.
As an initiator, the PCI controller does not perform any fast back-to-back transactions. As a target, the PCI
controller supports both types of fast back-to-back transactions.
During fast back-to-back transactions, the PCI controller monitors the bus states to determine if it is the
target of a transaction. If the previous transaction was not directed to the PCI controller but the current
transaction is directed at the PCI controller, it delays the assertion of PCI_DEVSEL (as well as
PCI_TRDY, PCI_STOP, and PCI_PERR) for one clock cycle to allow the other target to stop driving the
bus.
16.4.2.10 Dual Address Cycles
The PCI controller supports dual address cycle (DAC) commands (64-bit addressing on PCI bus) as both
an initiator and a target. DACs are different from single address cycles (SACs) in that the address phase
takes two PCI beats instead of one PCI beat to transfer (64-bit vs. 32-bit addressing). Only PCI memory
commands can use DAC cycles; I/O, configuration, interrupt acknowledge, and special cycle command
cannot use DAC cycles. The PCI controller block supports single-beat and burst DAC transactions.
For the case of the local processor, DAC generation depends on the setting of the POTEARx. If the
POTEARx are programmed with nonzero values and a transaction from the local processor core hits in
one of the outbound windows, a DAC transaction is generated on the PCI bus with the translated lower
32-bit addresses. Refer to
Section 16.3.1.2, “PCI ATMU Outbound Registers,”
for more information.
MPC8536E PowerQUICC III Integrated Processor Reference Manual, Rev. 1
16-56
Freescale Semiconductor
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