r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 173
r5f71374an80fpv
Manufacturer Part Number
r5f71374an80fpv
Description
32-bit Risc Microcomputer Superh?? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R5F71374AN80FPV.pdf
(1154 pages)
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7.4.4
1. By setting the SEQ bit in BRCR to 1, the sequential break is issued when a channel B break
2. In sequential break specification, the L or I bus can be selected and the execution times break
7.4.5
When a user break occurs, the address of the instruction from where execution is to be resumed is
saved in the stack, and the exception handling state is entered. If the L bus is specified as the break
condition, the instruction at which the user break should occur can be clearly determined (except
for when data is included in the break condition). If the I bus is specified as a break condition, the
instruction at which the user break should occur cannot be clearly determined.
1. When instruction fetch (before instruction execution) is specified as a break condition:
2. When instruction fetch (after instruction execution) is specified as a break condition:
When this kind of break occurs at a delayed branch instruction or its delay slot, the break may
not actually take place until the processing jumps to the first instruction at the branch
destination.
condition matches after a channel A break condition matches. A user break is not generated
even if a channel B break condition matches before a channel A break condition matches.
When channels A and B conditions match at the same time, the sequential break is not issued.
To clear the channel A condition match when a channel A condition match has occurred but a
channel B condition match has not yet occurred when a sequential break has been specified,
clear the SEQ bit in BRCR and channel A condition match flag to 0 by writing a 0 to them.
condition can be also specified. For example, when the execution times break condition is
specified, the break condition is satisfied when a channel B condition matches with BETR =
H'0001 after a channel A condition has matched.
The address of the instruction that matched the break condition is saved in the stack. The
instruction that matched the condition is not executed, and the user break occurs before it.
However when a delay slot instruction matches the condition, the address of the delayed
branch instruction is saved in the stack.
The address of the instruction following the instruction that matched the break condition is
saved in the stack. The instruction that matches the condition is executed, and the break occurs
before the next instruction is executed. However when a delayed branch instruction or delay
slot matches the condition, these instructions are executed, and the branch destination address
is saved in the stack.
Sequential Break
Value of Saved Program Counter
Rev. 1.00 Sep. 21, 2007 Page 147 of 1124
Section 7 User Break Controller (UBC)
REJ09B0402-0100
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