PXS20RM Datasheet, PDF (1116/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Nexus Crossbar Slave Port Data Trace Module (NXSS) [cut2/3 only]
Table 33-6 illustrates the range that is selected for data trace for various cases of DTSA being less than,
greater than, or equal to DTEA.
Table 33-6. Data trace address range options
Programmed values
DTSA  DTEA
DTSA  DTEA
DTSA > DTEA
Range control bit value
0
1
—
Range selected
DTSA DTEA
 DTSA DTEA 
Invalid range, no trace
NOTE
DTSA must be less than or equal to DTEA to guarantee correct data
write/read traces. When the range control bit is 0 (internal range), accesses
to DTSA and DTEA addresses are traced. When the range control bit is 1
(external range), accesses to DTSA and DTEA are not traced.
33.5.6 Breakpoint / Watchpoint Control Register 1 (BWC1)
The Breakpoint / Watchpoint Control Register 1 (BWC1) controls attributes for generation of NXSS_0 and
NXSS_1 watchpoint number 1.
Access: R/W
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R _{BWE BRW}
BWR BWT
W1 ¹
11
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 33-8. Break / Watchpoint Control Register 1 (BWC1)
Table 33-7. BWC1 field descriptions
Field
BWE1
BRW1
Description
Breakpoint/watchpoint #1 enable
00 Internal Nexus watchpoint #1 disabled
01–10 Reserved
11 Internal Nexus watchpoint #1 enabled
Breakpoint/watchpoint #1 read/write select
00 Watchpoint #1 hit on read accesses
01 Watchpoint #1 hit on write accesses
10 Watchpoint #1 on read or write accesses
11 Reserved
33-8
PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor