
Development Support
MPC561/MPC563 Reference Manual, Rev. 1.2
23-34
Freescale Semiconductor
The debug port command function allows the development tool to either assert or negate breakpoint
requests, reset the processor, activate or deactivate the fast down-load procedure.
23.4.6.7
Serial Data Out of Development Port — Trap Enable Mode
In trap enable mode the only response out of the development port is “sequencing error.”
Data that can come out of the development port is shown in
Table 23-12. “Valid data from CPU” and “CPU
interrupt” status cannot occur in trap enable mode.
Table 23-10. Trap Enable Data Shifted into Development Port Shift Register
Start
Mode
Contro
l
1st
2nd
3rd
4th
1st
2nd
VSYNC
Function
- - - - - - Instruction- - - - - -
- - Data- -
Watchpoint Trap Enables
1
0
0 = disabled; 1 = enabled
Transfer Data to
Trap Enable
Control Register
Table 23-11. Debug Port Command Shifted Into Development Port Shift Register
Start
Mode
Contro
l
Extended
Opcode
Major Opcode
Function
1
x
00000
NOP
00001
Hard Reset request
00010
Soft Reset request
0
x
00011
Reserved
1
0
00011
End Download procedure
1
00011
Start Download procedure
x
00100... 11110
Reserved
x
0
11111
Negate Maskable breakpoint.
x
1
11111
Assert Maskable breakpoint.
0
x
11111
Negate Non Maskable breakpoint.
1
x
11111
Assert Non Maskable breakpoint.