Motorola MPC823e Reference Manual page 1097

Development Capabilities and Interface
Table 20-8. Trap Enable Data Shifted Into DPS Register
START MODE CONTROL FIRST
INSTRUCTION WATCHPOINT
1 1 0
Table 20-9. DEBUG PORT Command Shifted Into the DPS Register
START MODE CONTROL
1 1 1
The watchpoint trap enable and VSYNC functions are described in
Section 20.3 Generating Watchpoints And Breakpoints and Section 20.2 Program
Flow Tracking. The DEBUG PORT command allows the development tool to either assert
or negate breakpoint requests, reset the processor, or activate or deactivate the fast
download procedure. Status out of the development interface port in the trap enable mode
is shown in Table 20-10.
20-36
SECOND THIRD FOURTH
DATA WATCHPOINT
TRAP ENABLES TRAP ENABLES
0 = Disabled
1 = Enabled
EXTENDED MAJOR OPCODE
OPCODE
x x 00000
00001
00010
0 x 00011
1 0 00011
1 1 00011
x x 00100 — 11110
x 0 11111
x 1 11111
0 x 11111
1 x 11111
MPC823e REFERENCE MANUAL
FIRST SECOND VSYNC
Transfer Data to
Trap Enable Control
FUNCTION
NOP
Hard Reset Request
Soft Reset Request
Reserved
End Download Procedure
Start Download Procedure
Reserved
Negate Maskable Breakpoint
Assert Maskable Breakpoint
Negate Nonmaskable Breakpoint
Assert Nonmaskable Breakpoint
FUNCTION
Register
MOTOROLA