PXN20RM Datasheet, PDF (1231/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

Nexus Development Interface (NDI)
Table 36-55 shows the mapping of RWD bytes to byte lanes of the AHB read and write data buses.
Table 36-55. RWD data placement for Transfers
Transfer Size and
byte offset
Byte @000
Byte @001
Byte @010
Byte @011
Half@000
Half@010
Word@000
RWA[2:0]
000
001
010
011
000
010
000
31:24
—
—
—
—
—
-
AHB[31:24]
RWD
23:16
—
—
—
—
—
-
AHB[23:16]
15:8
—
—
—
—
AHB[15:8]
AHB[31:24]
AHB[15:8]
7:0
AHB[7:0]
AHB[15:8]
AHB[23:16]
AHB[31:24]
AHB[7:0]
AHB[23:16]
AHB[7:0]
36.7.7.6 Watchpoint Trigger Register (WT)
The watchpoint trigger register allows the watch points defined within the e200z0 Nexus1 logic to trigger
actions. These watch points can control program trace enable and disable. The WT bits can be used to
produce an address related ‘window’ for triggering trace messages.
Nexus Reg: 0xB
Access: User read/write
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
PTS
W
00000000000000000000000000
PTE
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 36-59. Watchpoint Trigger Register (WT)
Table 36-56 details the watchpoint trigger register fields.
Freescale Semiconductor
PXN20 Microcontroller Reference Manual, Rev. 1
36-81