Rev. 2.0, 11/00, page 601 of 1037
27.3.4
BSR Instruction
(1) BSR Instruction (8-bit displacement)
When the trap address is the next instruction to the BSR instruction and the addressing mode
is an 8-bit displacement, transition is made to the address trap interrupt after prefetching the
instruction at the branch. The address to be stacked is 02C2.
Address bus
Interrupt
request
signal
BSR execution
Stack
saving
0294
SP-4
02C2
0296
SP-2
02C4
0294 BSR @ER0
0296 NOP
0298 NOP
02C2 MOV.W R4, @OUT
02C4 NOP
: :
(@ER0 = H'02C2)
*
Start of
exception handling
BSR
instruc-
tion
pre-fetch
NOP
instruc-
tion
pre-fetch
MOV
instruc-
tion
pre-fetch
*
Trap setting address
The underlines address is the
one to be actually stacked.
Figure 27.10 BSR Instruction (8-bit Displacement)
Содержание Hitachi H8S/2191
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