Freescale Semiconductor MPC5553 - E200 Z6 Class 3 Nexus Module (NZ6 C3)

MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
25-26 Freescale Semiconductor
25.10 e200z6 Class 3 Nexus Module (NZ6C3)
The NZ6C3 module provides real-time development capabilities for the MPC5553/MPC5554 core in
compliance with the IEEE-ISTO Nexus 5001-2003 standard. This module provides development
support capabilities without requiring the use of address and data pins for internal visibility.
25.10.1 Introduction
This section defines the auxiliary pin functions, transfer protocols and standard development features of
the NZ6C3 module. The development features supported are Program trace, data trace, watchpoint
messaging, ownership trace, and read/write access via the JTAG interface.
NOTE
Throughout this section references are made to the auxiliary port and its
specific signals, such as MCKO, MSEO[0:1], MDO[11:0] and others. In
actual use the MPC5553/MPC5554 NPC module arbitrates the access of the
single auxiliary port. To simplify the description of the function of the
NZ6C3 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 is fully described in Section 25.2, “External Signal
Description,” on page 25-5.
25.10.2 Block Diagram
Figure 25-12. e200z6 Nexus3 Functional Block Diagram
Message
Queues
NPC
Control and
I/O Logic
Memory Control
Control/Status
Registers
Registers
DMA Registers
DMA
(Read/Write)
Arbitration
Data
Snoop
Instruction
Snoop
n+1
MDO[n:0]
MSEO
(0)
MSEO
1
MCKO
EVTO
EVTI
RDY
TDI
TDO
TMS
TCLK
TRST
Breakpoint/
Watchpoint
Control
OnCE Debug
Nexus3 Module
Nexus1 Module (within e200z6 CPU)
e200z6 Virtual Bus
System Bus