
Real-Time Debug Support
MOTOROLA
Debug Support
19-37
Table 19-33 Configuration/Status Register (CSR)
BITS
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
FIELD
STATUS
FOF
TRG
HALT
BKPT
HRL
-
BKD
PCD
IPW
RESET
0
R/W
READ ONLY
R
READ ONLY
-
R/W
ADDR
BITS
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
FIELD
MAP
TRC
EMU
DDC
UHE
BTB
-
NPL
IPI
SSM
-
RESET
0
-
R/W
R
R/W
R/
W
R/W
ADDR
Note:
The CSR is a write only register from the programming model. It can be read from and written to
through the BDM port.
Table 19-34 Configuration/Status Bit Descriptions
BIT NAME
DESCRIPTION
STATUS[31:28]
The Breakpoint Status 4-bit field provides read-only status information concerning the
hardware breakpoints. This field is defined as follows:
000x = no breakpoints enabled
001x = waiting for level 1 breakpoint
010x = level 1 breakpoint triggered
101x = waiting for level 2 breakpoint
110x = level 2 breakpoint triggered
FOF[27]
If the read-only Fault-on-Fault status bit is set, a catastrophic halt has occurred and forced
entry into BDM. This bit is cleared on a read from the CSR.
TRG[26]
If the read-only Hardware Breakpoint Trigger status bit is set, a hardware breakpoint has
halted the processor core and forced entry into BDM. This bit is cleared by reading CSR.
HALT[25]
If the read-only Processor Halt status bit is set, the processor has executed the HALT
instruction and forced entry into BDM. This bit is cleared by reading the CSR.
BKPT[24]
If the read-only Breakpoint Assert status bit is set, the
BKPT signal was asserted, forcing the
processor into BDM. This bit is cleared on a read from the CSR.
HRL[23:20]
This hardware revision level indicates the level of functionality implemented in the debug
module. This information could be used by an emulator to identify the level of functionality
supported. A zero value would indicate the initial debug functionality. For example, a value of
1 would represent Revision A while a value of 0 would represent the earlier release of
Revision A.
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.