SH7751 Datasheet, PDF (912/1224 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

20. User Break Controller (UBC)
2. Instruction access match on channel A, operand access match on channel B
Instruction B is 0 or 1 instruction after Sequential operation is not guaranteed
instruction A
Instruction B is 2 or more instructions Sequential operation is guaranteed
after instruction A
3. Operand access match on channel A, instruction access match on channel B
Instruction B is 0 to 3 instructions after Sequential operation is not guaranteed
instruction A
Instruction B is 4 or more instructions Sequential operation is guaranteed
after instruction A
4. Operand access matches on both channel A and channel B
Do not make a setting such that a single operand access will match the break conditions of
both channel A and channel B. There are no other restrictions. For example, sequential
operation is guaranteed even if two accesses within a single instruction match channel A and
channel B conditions in turn.
20.3.9 Usage Notes
1. Do not execute a post-execution instruction access break for the SLEEP instruction.
2. Do not make an operand access break setting between 1 and 3 instructions before a SLEEP
instruction.
3. The value of the BL bit referenced in a user break exception depends on the break setting, as
follows.
a. Pre-execution instruction access break: The BL bit value before the executed instruction is
referenced.
b. Post-execution instruction access break: The OR of the BL bit values before and after the
executed instruction is referenced.
c. Operand access break (address/data): The BL bit value after the executed instruction is
referenced.
d. In the case of an instruction that modifies the BL bit
Rev.4.00 Oct. 10, 2008 Page 814 of 1122
REJ09B0370-0400