Rev. 3.0, 10/02, page 78 of 686
5.3.1
Interrupt Priority Registers A to G, I to K, M (IPRA to IPRG, IPRI to IPRK,
IPRM)
The IPR registers set priorities (levels 7 to 0) for interrupts other than NMI.
The correspondence between interrupt sources and IPR settings is shown in table 5.2. Setting a
value in the range from H'0 to H'7 in the 3-bit groups of bits 6 to 4 and 2 to 0 sets the priority of
the corresponding interrupt.
Bit
Bit Name
Initial Value
R/W
Description
7
–
0
–
Reserved
These bits are always read as 0 and cannot be
modified.
6
5
4
IPR6
IPR5
IPR4
1
1
1
R/W
R/W
R/W
Sets the priority of the corresponding interrupt source.
000: Priority level 0 (Lowest)
001: Priority level 1
010: Priority level 2
011: Priority level 3
100: Priority level 4
101: Priority level 5
110: Priority level 6
111: Priority level 7 (Highest)
3
–
0
–
Reserved
These bits are always read as 0 and cannot be
modified.
2
1
0
IPR2
IPR1
IPR0
1
1
1
R/W
R/W
R/W
Sets the priority of the corresponding interrupt source.
000: Priority level 0 (Lowest)
001: Priority level 1
010: Priority level 2
011: Priority level 3
100: Priority level 4
101: Priority level 5
110: Priority level 6
111: Priority level 7 (Highest)
Summary of Contents for H8S/2215 Series
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