NXP Semiconductors MPC5566, Reference Manual

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Nexus
MPC5566 Microcontroller Reference Manual, Rev. 2
25-30 Freescale Semiconductor
25.10.6 TCODEs Supported by NZ6C3
The Nexus3 pins allow for flexible transfer operations via public messages. A TCODE defines the transfer
format, the number and/or size of the packets to be transferred, and the purpose of each packet. The
IEEE
®
-ISTO 5001-2003 standard defines a set of public messages. The NZ6C3 module supports the
public TCODEs seen in Table 25-19 . Each message contains multiple packets transmitted in the order
shown in the table.
Table 25-19. Public TCODEs Supported by NZ6C3
Message Name
Packet Size
(bits) Packet
Name
Packet
Type
Packet Description
Min Max
Debug Status 6 6 TCODE Fixed TCODE number = 0 (0x00)
4 4 SRC Fixed Source processor identifier
8 8 STATUS Fixed Debug status register (DS[31:24])
Ownership Trace
Message 6 6 TCODE Fixed TCODE number = 2 (0x02)
4 4 SRC Fixed Source processor identifier
32 32 PROCESS Fixed Task/Process ID tag
Program Trace -
Direct Branch
Message
1
6 6 TCODE Fixed TCODE number = 3 (0x03)
4 4 SRC Fixed Source processor identifier
1 8 I-CNT Variable Number of sequential instructions executed since
last taken branch
Program Trace -
Indirect Branch
Message
1
6 6 TCODE Fixed TCODE number = 4 (0x04)
4 4 SRC Fixed Source processor identifier
1 8 I-CNT Variable Number of sequential instructions executed since
last taken branch
1 32 U-ADDR Variable Unique part of target address for taken
branches/exceptions
Data Trace -
Data Write Message 6 6 TCODE Fixed TCODE number = 5 (0x05)
4 4 SRC Fixed Source processor identifier
3 3 DSIZ Fixed Data size (refer to Table 25-23 )
1 32 U-ADDR Variable Unique portion of the data write address
1 64 DATA Variable Data write values (refer to Section 25.14.6, “Data
Trace ,” for details)