Motorola MPC533 Reference Manual page 958

Signal Interface
Fixed width fields can be concatenated before variable length fields without regard to the
individual fields starting or ending at message N bit boundaries. Variable width fields must
end at message N bit boundaries (where N is MDI/MDO signals).
Figure 22-13 shows the basic relation between the MDO and MSEO signals, and packet
structure. MDO and MSEO are sampled on the rising edge of MCKO.
MCKO
MSEO
MDO[7:0]
TCODE = 4
Number of Sequential Instructions since last taken branch = 4
Relative Address = 0x534
Figure 22-13. Auxiliary Signal Packet Structure for Program Trace Indirect
Figure 22-14 illustrates the state diagram for MSEI/MSEO transfers. In the End Message
state, data on MDI/O is ignored.
22-26
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
00000100 00000001
Branch Message
MPC533 Reference Manual
00110100 00000101
Don't care data
(idle clock)
00000000
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