Section 7 User Break Controller (UBC)
Rev. 3.00 Sep. 27, 2007 Page 132 of 758
REJ09B0243-0300
7.2.13
Branch Source Register (BRSR)
BRSR is a 32-bit read-only register. BRSR stores bits 27 to 0 in the address of the branch source
instruction. BRSR has the flag bit that is set to 1 when a branch occurs. This flag bit is cleared to 0
by a power-on reset or manual reset when BRSR is read or the setting to enable PC trace is made.
Other bits are not initialized by a power-on reset. The eight BRSR registers have a queue structure
and a stored register is shifted at every branch.
Bit:
Initial value:
R/W:
Bit:
Initial value:
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
0
0
0
0
-
-
-
-
-
-
-
-
-
-
-
-
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
SVF
-
-
-
BSA27 BSA26 BSA25 BSA24 BSA23 BSA22 BSA21 BSA20 BSA19 BSA18 BSA17 BSA16
BSA15 BSA14 BSA13 BSA12 BSA11 BSA10
BSA9
BSA8
BSA7
BSA6
BSA5
BSA4
BSA3
BSA2
BSA1
BSA0
Bit Bit
Name
Initial
Value
R/W Description
31
SVF
0
R
BRSR Valid Flag
Indicates whether the branch source address is stored.
This flag bit is set to 1 when a branch occurs. This flag
is cleared to 0 when BRSR is read, the setting to
enable PC trace is made, or BRSR is initialized by a
power-on reset.
0: The value of BRSR register is invalid
1: The value of BRSR register is valid
30 to 28
All 0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
27 to 0
BSA27 to
BSA0
Undefined
R
Branch Source Address
Store bits 27 to 0 of the branch source address.
Содержание SH7124 R5F7124
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Страница 36: ...Section 1 Overview Rev 3 00 Sep 27 2007 Page 16 of 758 REJ09B0243 0300 ...
Страница 68: ...Section 2 CPU Rev 3 00 Sep 27 2007 Page 48 of 758 REJ09B0243 0300 ...
Страница 108: ...Section 5 Exception Handling Rev 3 00 Sep 27 2007 Page 88 of 758 REJ09B0243 0300 ...
Страница 166: ...Section 7 User Break Controller UBC Rev 3 00 Sep 27 2007 Page 146 of 758 REJ09B0243 0300 ...
Страница 400: ...Section 9 Multi Function Timer Pulse Unit 2 MTU2 Rev 3 00 Sep 27 2007 Page 380 of 758 REJ09B0243 0300 ...
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