260
Chapter 5 Interrupt
Example 1: Use NOP instructions to prevent I flag being set to “1”
before interrupt control register is changed
INT_SWITCH1:
FCLR
I
; Disable interrupts
AND.B
#00H, 0056H ; Set TXIC register to “00
16
”
NOP
NOP
FSET
I
; Enable interrupts
Example 2: Use dummy read to have FSET instruction wait
INT_SWITCH2:
FCLR
I
; Disable interrupts
AND.B
#00H, 0056H ; Set TXIC register to “00
16
”
MOV.W MEM, R0
; Dummy read
FSET
I
; Enable interrupts
Example 3: Use POPC instruction to change I flag
INT_SWITCH3:
PUSHC FLG
FCLR
I
; Disable interrupts
AND.B
#00H, 0056H ; Set TXIC register to “00
16
”
POPC
FLG
; Enable interrupts
Содержание R8C/Tiny Series
Страница 50: ...Chapter 3 Functions 3 1 Guide to This Chapter 3 2 Functions...
Страница 151: ...134 Chapter 3 Functions 3 2 Functions Blank for page layout...
Страница 152: ...Chapter 4 Instruction Code Number of Cycles 4 1 Guide to This Chapter 4 2 Instruction Code Number of Cycles...
Страница 278: ...Chapter 6 Calculation Number of Cycles 6 1 Instruction queue buffer...
Страница 287: ...Glossary 1 Glossary Technical terms used in this software manual are explained below They are good in this manual only...
Страница 291: ...Symbol 1 Table of symbols Symbols used in this software manual are explained below They are good in this manual only...
Страница 295: ...REVISION HISTORY R8C Tiny Series SOFTWARE MANUAL Rev Date Description Page Summary B 1 1 00 Jun 19 03 First Edition...
Страница 297: ...R8C Tiny Series Software Manual 2 6 2 Ote machi Chiyoda ku Tokyo 100 0004 Japan...