Development Support
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
23-43
23.6.4
Debug Enable Register (DER)
This register enables selectively masking the events that may cause the processor to enter into debug mode.
22:27
—
Reserved
28
LBRK
L-bus breakpoint exception bit. This bit is set as a result of the assertion of a load/store
breakpoint. Results in debug mode entry if debug mode is enabled and the corresponding enable
bit is set.
29
IBRK
I-bus breakpoint exception bit. This bit is set as a result of the assertion of an Instruction
breakpoint. Results in debug mode entry if debug mode is enabled and the corresponding enable
bit is set.
30
EBRK
External breakpoint exception bit. Set when an external breakpoint is asserted (by an on-chip
IMB or L-bus module, or by an external device or development system through the development
port). This bit is set as a result of the assertion of an external breakpoint. Results in debug mode
entry if debug mode is enabled and the corresponding enable bit is set.
31
DPI
Development port interrupt bit. Set by the development port as a result of a debug station
non-maskable request or when debug mode is entered immediately out of reset.
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field
—
RSTE CHSTPE
MCEE
—
EXTIE ALEE PREE FPUVEE DECEE
—
SYSEE
TRE
FPASE
SRESET
0
0
1
0
0000_0000_0
0
1
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
LSB
31
Field
—
SEEE
—
ITLBERE
—
DTLBERE
—
LBRKE IBRKE EBRKE
DPIE
SRESET
0000_0000_0000
1
1
1
1
Addr
SPR 149
Figure 23-17. Debug Enable Register (DER)
Table 23-19. DER Bit Descriptions
Bits
Name
Description
0:1
—
Reserved
1
RSTE
Reset enable
0 Debug entry is disabled (reset value)
1 Debug entry is enabled
2
CHSTPE
Checkstop enable bit
0 Debug mode entry disabled
1 Debug mode entry enabled (reset value)
3
MCEE
Machine check exception enable bit
0 Debug mode entry disabled (reset value)
1 Debug mode entry enabled
Table 23-18. ECR Bit Descriptions (continued)
Bits
Name
Description
Summary of Contents for MPC561
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