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User’s Manual U11969EJ3V0UM00
CHAPTER 5 INTERRUPT/EXCEPTION PROCESSING FUNCTION
5.3.4 Interrupt control register (xxICn)
An interrupt control register is assigned to each maskable interrupt and sets the control conditions for each
maskable interrupt request.
The interrupt control register can be read/written in 8- or 1-bit units.
Bit Position
Bit Name
Function
7
xxIFn
Interrupt Request Flag
Interrupt request flag
0: Interrupt request not issued
1: Interrupt request issued
xxIFn flag is automatically reset by hardware when interrupt request is accepted.
6
xxMKn
Mask Flag
Interrupt mask flag
0: Enables interrupt processing
1: Disables interrupt processing (pending)
2 to 0
xxPRn2 to xxPRn0
Priority
Specifies eight levels of priorities for each interrupt
xxPRn2
xxPRn1
xxPRn0
Interrupt priority specification bit
0
0
0
Specifies level 0 (highest)
0
0
1
Specifies level 1
0
1
0
Specifies level 2
0
1
1
Specifies level 3
1
0
0
Specifies level 4
1
0
1
Specifies level 5
1
1
0
Specifies level 6
1
1
1
Specifies level 7 (lowest)
Remark
xx : identification name of each peripheral unit (OV, CC0, P1, CM1, CM2, CC3, CS, II, SE, SR, ST,
AD, P5)
n : peripheral unit number (0 to 4)
Address
FFFFF100H to
FFFFF13CH
7
xxIFn
xxICn
6
xxMKn
5
0
4
0
3
0
2
xxPRn2
1
xxPRn1
0
xxPRn0
After reset
47H
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