Nexus
MPC5566 Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor 25-63
Figure 25-48. Data Trace—Data Read with Sync Message
Figure 25-49. Error Message (Data Trace only encoded)
25.14.7 Watchpoint Support
This section details the watchpoint features of the NZ6C3 module.
25.14.7.1 Overview
The NZ6C3 module provides watchpoint messaging via the auxiliary pins, as defined by the IEEE®-ISTO
5001-2003 standard.
NZ6C3 is not compliant with Class4 breakpoint/watchpoint requirements defined in the standard. The
breakpoint/watchpoint control register is not implemented.
25.14.7.2 Watchpoint Messaging
Enabling watchpoint messaging is done by setting the watchpoint enable bit in the DC1 register. Setting
the individual watchpoint sources is supported through the e200z6 Nexus1 module. The e200z6 Nexus1
module is capable of setting multiple address and/or data watchpoints. Please refer to the e200z6 Core
Reference Manual for more information on watchpoint initialization.
When these watchpoints occur, a watchpoint event signal from the Nexus1 module causes a message to be
sent to the queue to be messaged out. This message includes the watchpoint number indicating which
watchpoint caused the message.
The occurrence of any of the e200z6 defined watchpoints can be programmed to assert the event out EVTO
pin for one period of the output clock (MCKO).
00001110 11000000 01011001 11010001 00101000 00000000 01011100
MCKO
MSEO
_B[1:0]
TCODE = 14
Source Processor = 0b0000
Data Size = 000 (Byte)
Full Access Address = 0x0146_8ACE
00
MDO[7:0]
11
Write Data = 0x5C
01 11
MCKO
MSEO
_B[1:0]
TCODE = 8
Source Processor = 0b0000
Error Code = 2 (Queue Overrun – DTM Only)
00
MDO[7:0]
11 11 xx
00001000 00001000 xxxxxxxx
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