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Chapter 7
Interrupt/Exception Processing Function
Preliminary User’s Manual U14913EE1V0UM00
7.3.4 Interrupt control register (PICn)
An interrupt control register is assigned to each interrupt request (maskable interrupt) and sets the con-
trol conditions for each maskable interrupt request.
This register can be read/written in 8-bit or 1-bit units.
Figure 7-11: Interrupt Control Register (PICn)
Remark:
n = 0 to 59
The address and bit of each interrupt control register are shown in the following Table 7-2.
7
6
5
4
3
2
1
0
Address
Initial
value
PICn
PIFn
PMKn
0
0
0
PPRn2
PPRn1
PPRn0
FFFFF110H
to FFFF18EH
47H
Bit Position
Bit Name
Function
7
PIFn
This is an interrupt request flag.
0: Interrupt request not issued
1: Interrupt request issued
The flag xxIFn is reset automatically by the hardware if an interrupt request is
acknowledged.
6
PMKn
This is an interrupt mask flag.
0: Enables interrupt processing
1: Disables interrupt processing (pending)
2 to 0
PPRn2 to
PPRn0
8 levels of priority order are specified for each interrupt.
PPRn2
PPRn1
PPRn0
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)
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