PXR40RM Datasheet, PDF (1380/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Nexus Development Interface (NDI)
NOTE
The auxiliary port and its signals, such as MCKO, MSEO[1:0], MDO[15:0]
and others, are referenced. The device NPC module arbitrates the access of
the single auxiliary port. The functions of the NXDM and FlexRay modules
are described without the interaction of the NPC, as if Nexus has a dedicated
auxiliary port, to simplify the description. The auxiliary port function is
described in full in Section 31.2, External Signal Description.
31.15.1 Block Diagrams
Figure 31-41 shows a block diagram of the NXDM. The block diagram of the NXFR is the same.
Data
snoop
Message
queues
Memory control
I/O logic
n+1
NPC
Control and
arbitration
MDO[n:0]
MSEO[0]
MSEO[1]
MCKO
EVTO
EVTI
Registers
General control
and status
Breakpoint/
watchpoint
control
IEEE 1149.1
(JTAG)
TAP controller
Figure 31-41. NXDM and NXFR Block Diagram
TDI
TDO
TMS
TCLK
TRST
(JCOMP)
31.15.2 Features
Features include the following:
• Data trace via data write messaging (DWM) and data read messaging (DRM). This provides the
capability for the development tool to trace reads and/or writes through the eDMA and FlexRay
modules to (selected) internal memory resources.
• Watchpoint messaging via the auxiliary pins.
• Watchpoint trigger enable of data trace messaging (DTM).
• Registers for data trace, watchpoint generation, and watchpoint trigger.
• All features controllable and configurable via the JTAG port.
31-64
PXR40 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor