m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 544
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m37905
Manufacturer Part Number
m37905
Description
Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M37905.pdf
(565 pages)
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Manufacturer:
MIT
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To prevent this problem, make sure that the routine which should not accept a certain interrupt
request will be executed after the change of the interrupt priority level (IPL) has been completed.
(This is to be made by software.)
The following is a sample program.
[Sample program]
A
After writing “000
several NOP instructions to make the next instruction not to be executed before this writing is
completed.
MOVMB XXXIC, #00H
NOP
NOP
LDA
:
:
:
A,DATA
2
” to the interrupt priority level select bits, the instruction queue buffer is filled with
; Instruction at the beginning of the routine that should not accept a
; Writes “000
; Inserts ten NOP instructions.
;
certain interrupt request
7905 Group User’s Manual Rev.1.0
2
” to the interrupt priority level select bits.
Appendix 8. 7905 Group Q & A
APPENDIX
Interrupts
(2/2)
20-113
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