Motorola MPC533 Reference Manual page 1022

RCPU Development Access
DSDI message fields of the development port access message are explained in Table 22-33.
.
Table 22-33. Development Port Access: DSDI Field
Header
Start Mode Control
1 0 0
1 0 1
1 1 0
1 1 1
1 1 1
DSDO message fields of the development port access message are explained in
Table 22-34.
Table 22-34. Development Port Access: DSDO Field
Header
Ready Status [0:1]
(0) 0
(0) 0
(0) 1
(0) 1
1
The "Freeze" status is set to (1) when the CPU is in debug mode and to (0) otherwise.
2
The "Download Procedure in progress" status is asserted (0) when Debug port in the Download procedure and is
negated (1) otherwise.
22-90
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Instruction / Data (32 Bits)
Bits 0:6
CPU Instruction
CPU Data
Trap enable
0011111
0
Bit 0 Bit 1
0
1 Freeze Download
1
status Procedure
0
in progress
1
MPC533 Reference Manual
Data
Bits 7:31
Does not exist
Does not exist
Does not exist
Data
Bits 2:31 or 2:6 —
(Depending on Input Mode)
Data
1's
1's
2
1's
Function
Transfer Instruction
to CPU
Transfer Data
to CPU
Transfer data to
Trap Enable
Control Register
Negate breakpoint requests
to the CPU.
NOP
Function
Valid Data from CPU
Sequencing Error
CPU Interrupt
Null
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