Renesas R8C/Tiny Series Software Manual page 278
16-bit single-chip microcomputer
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Also See for R8C/Tiny Series:
- User manual (29 pages) ,
- Hardware manual (227 pages) ,
- Software manual (297 pages)
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Chapter 5
Interrupts
Example 1: Use NOP instruction to prevent I flag being set to 1
INT_SWITCH1:
FCLR
AND.B
NOP
NOP
FSET
Example 2: Use dummy read to delay FSET instruction
INT_SWITCH2:
FCLR
AND.B
MOV.W MEM, R0
FSET
Example 3: Use POPC instruction to change I flag
INT_SWITCH3:
PUSHC FLG
FCLR
AND.B
POPC
Rev.2.00 Oct 17, 2005
REJ09B0001-0200
before interrupt control register is changed
I
; Disable interrupts
#00H, 0056H ; Set TXIC register to 00
I
; Enable interrupts
I
; Disable interrupts
#00H, 0056H ; Set TXIC register to 00
; Dummy read
I
; Enable interrupts
I
; Disable interrupts
#00H, 0056H ; Set TXIC register to 00
FLG
; Enable interrupts
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