dsp56000 Freescale Semiconductor, Inc, dsp56000 Datasheet - Page 200

• Manufacturer Part Number: dsp56000
• Description: 24-bit Digital Signal Processor Family Manual
• Manufacturer: Freescale Semiconductor, Inc

When BC3-BC0=0011, program memory breakpoints are enabled for any read or write
access to the Program space (any kind of MOVE, true and false fetches, fetches of sec-
ond word, etc.).
When BC3-BC0=0100, program memory breakpoints are enabled only for fetches of the
first instruction word of instructions that are actually executed. Aborted instructions and
prefetched instructions that are discarded (such as jump targets that are not taken) are
ignored by the breakpoint logic.
When BC3-BC0=0101, 0110 or 0111, program memory breakpoints are enabled only for
explicit program memory access resulting from MOVEP or MOVEM instructions to/from
P: memory space.
10.3.4.2
The TME control bit, when set, enables the Trace Mode of operation (see Section 10.5).
This bit is cleared on hardware reset.
10.3.4.3
These bits are reserved for future use. They read as zero and should be written with zero
for future compatibility.
MOTOROLA
BC3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
BC2
Trace Mode Enable (TME) Bit 4
Reserved (Bits 5-7, 11-15)
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
OnCE CONTROLLER AND SERIAL INTERFACE
Table 10-3 Memory Breakpoint Control Table
BC1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Freescale Semiconductor, Inc.
For More Information On This Product,
BC0
ON-CHIP EMULATION (OnCE)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
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Breakpoint disabled
Breakpoint on any fetch (including aborted instructions)
Breakpoint on any P read (any fetch or move)
Breakpoint on any P access (any fetch, P move R/W)
Breakpoint on executed fetches only
Breakpoint on P space write
Breakpoint on P space read (no fetches)
Breakpoint on P space write or read (no fetches)
Reserved
Breakpoint on X space write
Breakpoint on X space read
Breakpoint on X space write or read
Reserved
Breakpoint on Y space write
Breakpoint on Y space read
Breakpoint on Y space write or read
DESCRIPTION
10 - 11