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5.2.2 Interrupt Priority Registers A and B (IPRA, IPRB)
IPRA and IPRB are 8-bit readable/writable registers that control interrupt priority.
Interrupt Priority Register A (IPRA): IPRA is an 8-bit readable/writable register in which
interrupt priority levels can be set.
Bit
IPRA7
Initial value
Read/Write
R/W
Priority level A7
Selects the priority level of IRQ interrupt requests
IPRA is initialized to H'00 by a reset and in hardware standby mode.
86
7
6
IPRA6
0
0
R/W
R/W
Reserved bit
Priority level A6
Selects the priority level of IRQ
5
4
—
IPRA4
IPRA3
0
0
R/W
R/W
Priority level A3
Selects the priority level of
WDT interrupt requests
Priority level A4
Selects the priority level of IRQ
interrupt requests
interrupt requests
1
0
3
2
IPRA2
IPRA1
0
0
R/W
R/W
Priority level A1
Selects the priority level
of ITU channel 1
interrupt requests
Priority level A2
Selects the priority level of
ITU channel 0 interrupt requests
and IRQ
4
1
0
IPRA0
0
0
R/W
Priority
level A0
Selects the
priority level
of ITU
channel 2
interrupt
requests
5
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