Section 6 User Break Controller (UBC)
Rev. 2.00 Mar 09, 2006 page 233 of 906
REJ09B0292-0200
6.2.20
Branch Flag Registers (BRFR)
Bit:
15
14
13
12
11
10
9
8
SVF
PID2
PID1
PID0
—
—
—
—
Initial value:
0
Undefined Undefined Undefined
0
0
0
0
R/W:
R
R
R
R
R
R
R
R
Bit:
7
6
5
4
3
2
1
0
DVF
—
—
—
—
—
—
—
Initial value:
0
0
0
0
0
0
0
0
R/W:
R
R
R
R
R
R
R
R
The branch flag registers (BRFR) comprise a set of four 16-bit read-only registers. The BRFR
registers contain flags indicating whether the actual branch addresses (in a branch instruction,
repeat, interrupt, etc.) have been saved in BRSR and BRDR, and a 3-bit pointer indicating the
number of cycles from fetch to execution of the last instruction executed. The BRFR registers
form a FIFO (first-in first-out) queue for PC trace use. The queue is shifted at each branch.
Bits SVF and DVF are initialized by a power-on reset, but bits PID2 to PID0 are not.
Bit 15—Source Verify Flag (SVF): Indicates whether the address and pointer that enable the
branch source address to be calculated have been stored in BRSR. This flag is set when the
instruction at the branch destination address is fetched, and reset when BRSR is read.
Bit 15: SVF
Description
0
BRSR value is invalid
(Initial value)
1
BRSR value is valid
Bits 14 to 12—PID2 to PID0: These bits comprise a pointer that indicates the instruction buffer
number of the instruction executed immediately before a branch occurred.
Bits 14 to 12:
PID2 to PID0
Description
Odd
PID indicates instruction buffer number
(Initial value)
Even
PID+2 indicates instruction buffer number
Bits 11 to 8, 6 to 0—Reserved: These bits are always read as 0. The write value should always be
0.
Содержание SH7616
Страница 10: ...Rev 2 00 Mar 09 2006 page x of xxvi ...
Страница 132: ...Section 2 CPU Rev 2 00 Mar 09 2006 page 106 of 906 REJ09B0292 0200 ...
Страница 568: ...Section 12 16 Bit Free Running Timer FRT Rev 2 00 Mar 09 2006 page 542 of 906 REJ09B0292 0200 ...
Страница 582: ...Section 13 Watchdog Timer WDT Rev 2 00 Mar 09 2006 page 556 of 906 REJ09B0292 0200 ...
Страница 662: ...Section 14 Serial Communication Interface with FIFO SCIF Rev 2 00 Mar 09 2006 page 636 of 906 REJ09B0292 0200 ...
Страница 706: ...Section 16 Serial I O SIO Rev 2 00 Mar 09 2006 page 680 of 906 REJ09B0292 0200 ...
Страница 820: ...Section 19 Pin Function Controller PFC Rev 2 00 Mar 09 2006 page 794 of 906 REJ09B0292 0200 ...
Страница 932: ...Appendix D Package Dimensions Rev 2 00 Mar 09 2006 page 906 of 906 REJ09B0292 0200 ...
Страница 935: ...SH7616 Hardware Manual ...