PXN20RM Datasheet, PDF (1217/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

Nexus Development Interface (NDI)
3
2
1
ECODE (00011)
SRC
TCODE (001000)
MSB
5 bits
4 bits
6 bits
LSB
Fixed length = 15 bits
Figure 36-51. Error Message Format
36.6.10.7 Examples
The following are examples of program trace and data trace messages.
Table 36-38 illustrates an example indirect branch message with an 12 MDO / 2 MSEO configuration.
Note that T0 and S0 are the least significant bits where:
• Tx = TCODE number (fixed)
• Sx = Source processor (fixed)
• Ix = Number of instructions (variable)
• Ax = Unique portion of the address (variable)
Table 36-38. Indirect Branch Message Example (12 MDO / 2 MSEO)
Clock
MDO[11:0]
MSEO[1:0]
State
11 10 9
8
7
6
5
4
3
2
1
0
0 XXXXXXXXXXXX 1
1 Idle (or end of last message)
1 I1 I0 S3 S2 S1 S0 T5 T4 T3 T2 T1 T0 0
0 Start Message
2 0 0 0 0 0 0 0 0 I5 I4 I3 I2 0
1 End Packet
3 0 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 1
1 End Packet/End Message
4 X X S3 S2 S1 S0 T5 T4 T3 T2 T1 T0 0
0 Start of Next Message
Table 36-39 illustrates an example of direct branch message with 12 MDO / 2 MSEO.
Note that T0 and I0 are the least significant bits where:
• Tx = TCODE number (fixed)
• Sx = Source processor (fixed)
• Ix = Number of instructions (variable)
Table 36-39. Direct Branch Message Example (12 MDO / 2 MSEO)
Clock
11
0X
1 I1
MDO[11:0]
10 9 8 7 6 5 4 3 2 1 0
XXXXXXXXXXX
I0 S3 S2 S1 S0 T5 T4 T3 T2 T1 T0
MSEO[1:0]
State
1
1 Idle (or end of last message)
0
0 Start Message
Freescale Semiconductor
PXN20 Microcontroller Reference Manual, Rev. 1
36-67