Nexus
MPC5565 Microcontroller Reference Manual, Rev. 1.0
24-82
Freescale Semiconductor
24.14.2.8 Breakpoint/Watchpoint Address Registers 1 and 2 (BWA1 and BWA2)
The breakpoint/watchpoint address registers are compared with bus addresses to generate internal
watchpoints.
24.14.2.9 Unimplemented Registers
Unimplemented registers are those with client select and index value combinations other than those listed
in
. For unimplemented registers, the NXDM module will drive TDO to zero during the
“SHIFT-DR” state. It will also transmit an error message with the invalid access opcode encoding.
24.14.2.10 Programming Considerations (RESET)
If Nexus3 register configuration is to occur during system reset (as opposed to debug mode), all NXDM
configuration should be completed between the negation of JCOMP and system reset de-assertion, after
the JTAG DID register has been read by the tool.
Table 24-53. BWC2 Field Description
Field
Description
31–30
BWE2
Breakpoint/watchpoint #2 enable
00Internal Nexus watchpoint #2 disabled
01-10 Reserved
11 Internal Nexus watchpoint #2 enabled
29–28
BRW2
Breakpoint/watchpoint #2 read/write select
00 Watchpoint #2 hit on read accesses
01 Watchpoint #2 hit on write accesses
10 Watchpoint #2 on read or write accesses
11 Reserved
27–18
Reserved, read as 0.
17–16
BWR2
Breakpoint/watchpoint #2 register compare
00 No register compare (same as BWC1[31:30] = 2’b00)
01 Reserved
10 Compare with BWA2 value
11 Reserved
15
BWT2
Breakpoint/watchpoint #2 Type
0 Reserved
1 Watchpoint #2 on data accesses
14–0
Reserved, read as 0.
Access: R/W
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
BREAKPOINT / WATCHPOINT ADDRESS
W
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 24-63. Breakpoint / Watchpoint Address Registers (BWA1, BWA2)
Summary of Contents for MPC5565
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