NXP Semiconductors MPC5566, Reference Manual

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Nexus
MPC5566 Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor 25-73
25.15 Nexus Crossbar eDMA Interface (NXDM)
The third module of the device NDI interface is the e200z6 eDMA Nexus module (NXDM) which is
compliant with the Class 3 defined data trace feature of the IEEE
®
-ISTO 5001-2003 standard. The NXDM
can be programmed to trace data accesses for the eDMA module on the system bus. This eDMA module
as well as the Nexus module are components of the e200z6 platform. All output messages and register
accesses are compliant with the protocol defined in the IEEE
®
-ISTO 5001 standard.
NOTE
Throughout this section references are made to the auxiliary port and its
specific signals, such as MCKO, MSEO[1:0], MDO[12:0] and others. In
actual use the device NPC module arbitrates the access of the single
auxiliary port. To simplify the description of the function of the NXDM
module, the interaction of the NPC is omitted and the behavior described as
if the module has its own dedicated auxiliary port. The auxiliary port
function is fully described in
Section 25.2, “External Signal Description .”
25.15.1 Block Diagram
Figure 25-54 shows a block diagram of the NXDM.
Figure 25-54. NXDM Block Diagram
Breakpoint/
watchpoint
control
Message
queues
NPC
Control and
I/O logic
Memory control
General control
and status
Registers
arbitration
Data
snoop
n + 1
MDO[n:0]
MSEO[0]
MSEO[1]
MCKO
EVTO
EVTI
TDI
TDO
TMS
TCLK
TRST
IEEE 1149.1
System
bus
(JTAG)
TAP controller
(JCOMP)