Nexus
MPC5565 Microcontroller Reference Manual, Rev. 1.0
Freescale Semiconductor
24-71
24.11.15.8 Read/Write Access Error Message
The read/write access error message is sent out when an system bus access error (read or write) has
occurred.
Error information is messaged out in the following format:
Figure 24-53. Error Message Format
24.11.16 Examples
The following are examples of program trace and data trace messages.
illustrates an example indirect branch message with an 8 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)
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 24-40. 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
X
X
X
X
X
X
X
X
X
X
X
X
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
ECODE (00011)
MSB
LSB
1
2
SRC
TCODE (001000)
3
6 bits
4 bits
5 bits
Fixed length = 15 bits
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