Nexus
MPC5566 Microcontroller Reference Manual, Rev. 2
25-82
Freescale Semiconductor
25.17.2.8 Breakpoint/Watchpoint Address Registers 1 and 2 (BWA1 and BWA2)
The breakpoint/watchpoint address registers are compared with bus addresses to generate internal
watchpoints.
25.17.2.9 Unimplemented Registers
Unimplemented registers are those with client select and index value combinations other than those listed
in
. For unimplemented registers, the NXDM module drives TDO to zero during the
“SHIFT-DR” state. It also transmits an error message with the invalid access opcode encoding.
25.17.2.10 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.
25.17.2.11 IEEE
®
1149.1 (JTAG) Test Access Port
The NXDM module uses the IEEE
®
1149.1
TAP controller for accessing Nexus resources. The JTAG
signals themselves are shared by all TAP controllers on the device. Refer to
Access Port Controller (JTAGC)
for more information on the JTAG interface.
The NXDM modules implements a 4-bit instruction register (IR). The valid instructions and method for
register access are outlined in
Section 25.7.2.3, “IEEE‚ 1149.1-2001 (JTAG) TAP
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 25-63. Breakpoint / Watchpoint Address Registers (BWA1, BWA2)
Table 25-53. BWC2 Field Description (continued)
Field
Description
Summary of Contents for MPC5566
Page 81: ...Introduction MPC5566 Microcontroller Reference Manual Rev 2 1 24 Freescale Semiconductor...
Page 135: ...Signal Description MPC5566 Microcontroller Reference Manual Rev 2 2 54 Freescale Semiconductor...
Page 189: ...Reset MPC5566 Microcontroller Reference Manual Rev 2 4 20 Freescale Semiconductor...
Page 603: ...Flash Memory MPC5566 Microcontroller Reference Manual Rev 2 13 38 Freescale Semiconductor...
Page 609: ...SRAM MPC5566 Microcontroller Reference Manual Rev 2 14 6 Freescale Semiconductor...
Page 1073: ...MPC5566 Microcontroller Reference Manual Rev 2 22 36 Freescale Semiconductor...
Page 1185: ...Nexus MPC5566 Microcontroller Reference Manual Rev 2 25 92 Freescale Semiconductor...
