NXP Semiconductors MPC5566 - Page 1127

Nexus
MPC5566 Microcontroller Reference Manual, Rev. 2
25-34 Freescale Semiconductor
Table 25-21 shows the encodings used for resource codes for certain messages.
Table 25-22 shows the event code encodings used for certain messages.
Table 25-23 shows the data trace size encodings used for certain messages.
Table 25-21. RCODE values (TCODE = 27)
Resource Code
(RCODE)
Description
Resource Data
(RDATA)
0000 Program Trace Instruction Counter overflow
(reached 255 and was reset)
0xFF
0001 Program Trace, Branch / Predicate Instruction
History. This type of packet is terminated by a stop
bit set to 1 after the last history bit.
Branch History. This type of
packet is terminated by a
stop bit set to a 1 after the
last history bit.
Table 25-22. Event Code Encoding (TCODE = 33)
Event Code Description
0000 Entry into Debug Mode
0001 Entry into Low Power Mode (CPU only)
1
1
The device enters Low Power Mode when the Nexus stall mode is enabled
(NZ6C3_DC1[OVC]=0b011) and a trace message is in danger of over-flowing the
Nexus queue.
0010–0011 Reserved for future functionality
0100 Disabling Program Trace
0101–1101 Reserved for future functionality
1110 Entry into a VLE page from a non-VLE page
1111 Entry into a non-VLE page from a VLE page
Table 25-23. Data Trace Size Encodings (TCODE = 5, 6, 13, 14)
DTM Size
Encoding
Transfer Size
000 Byte
001 Halfword (two bytes)
010 Word (four bytes)
011 Doubleword (eight bytes)
100 String (three bytes)
101–111 Reserved