Nexus Development Interface (NDI)
PXN20 Microcontroller Reference Manual, Rev. 1
36-60 Freescale Semiconductor
36.6.10.4.4 Data Trace Timing Diagrams (12 MDO Configuration)
Figure 36-45. Data Trace—Data Write Message
Figure 36-46. Data Trace—Data Read with Sync Message
Figure 36-47. Error Message (Data Trace only encoded)
36.6.10.5 Watchpoint Support
This section details the watchpoint features of the Nexus3+ module.
36.6.10.5.1 Overview
The Nexus3+ module provides watchpoint messaging via the auxiliary pins, as defined by the IEEE-ISTO
5001-2003 standard.
Nexus3+ is not compliant with Class4 breakpoint/watchpoint requirements defined in the standard. The
breakpoint/watchpoint control register is not implemented.
MCKO
MSEO[1:0]
TCODE = 5
Source Processor = 0b0000
Data Size = 010 (Half-Word)
Relative Address = 0xA5
00
MDO[11:0]
11 00 01 00 11
000000000101 000010101000 000000010100 000011101111 000010111110
Write Data = 0xBEEF
000000001110
000011000000
000001011001
000011010001
000000101000 000000000000 000001011100
MCKO
MSEO[1:0]
TCODE = 14
Source Processor = 0b0000
Data Size = 000 (Byte)
Full Access Address = 0x0146_8ACE
00
MDO[11:0]
11
Write Data = 0x5C
01 11
MCKO
MSEO[1:0]
TCODE = 8
Source Processor = 0b0000
Error Code = 2 (Queue Overrun – DTM Only)
00
MDO[11:0]
11 11 xx
000000001000 000000001000 xxxxxxxxxxxx
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