Freescale Semiconductor MPC5565, Reference Manual

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Nexus
MPC5565 Microcontroller Reference Manual, Rev. 1.0
Freescale Semiconductor 24-85
If the NXDM module is disabled, no trace output will be provided, and the module will disable (drive
inactive) auxiliary port output pins (MDO[11:0], MSEO[1:0], MCKO). Nexus registers will not be
available for reads or writes.
24.14.5 TCODEs Supported by NXDM
The NXDM 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 NXDM block currently support
the public TCODEs seen in Table 24-56 .
Table 24-56. Public TCODEs Supported
Message Name
Packet Size
Bits Packet
Name
Packet Type Packet Description
Min Max
Data Trace -
Date Write
Message 6 6 TCODE Fixed TCODE number = 5
4 4 SRC Fixed Source processor identifier (multiple Nexus
configuration)
3 3 DSZ Fixed Data size (refer to Table 24-58 )
1 32 U-ADDR Variable Unique portion of the data write value
1 64 DATA Variable Data write value
Data Trace -
Data Read
Message 6 6 TCODE Fixed TCODE number = 6
4 4 SRC Fixed Source processor identifier (multiple Nexus
configuration)
3 3 DSZ Fixed Data size (refer to Table 24-58 )
1 32 U-ADDR Variable Unique portion of the data read value
1 64 DATA Variable Data read value
Error Message 6 6 TCODE Fixed TCODE number = 8
4 4 SRC Fixed Source processor identifier (multiple Nexus
configuration)
5 5 ECODE Fixed Error code (refer to Table 24-57 )
Data Trace -
Data Write
Message w/
Sync 6 6 TCODE Fixed TCODE number = 13 (0xD)
4 4 SRC Fixed Source processor identifier (multiple Nexus
configuration)
3 3 DSZ Fixed Data size (refer to Table 24-58 )
1 32 F-ADDR Variable Full access address (leading zero (0) truncated)
1 64 DATA Variable Data write value