SH7047 Datasheet, PDF (120/764 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTMRISC engine Family/SH7000 Series

6.3.4 Interrupt Priority Registers A, D to I, K (IPRA, IPRD to IPRI, IPRK)
Interrupt priority registers are nine 16-bit readable/writable registers that set priority levels from 0
to 15 for interrupts except NMI. For the correspondence between interrupt request sources and
IPR, refer to table 6.2 Interrupt Request Sources, Vector Address, and Interrupt Priority Level.
Each of the corresponding interrupt priority ranks are established by setting a value from H'0 to
H'F in each of the four-bit groups 15 to 12, 11 to 8, 7 to 4 and 3 to 0. Reserved bits that are not
assigned should be set H'0 (B'0000.)
Initial
Bit
Bit Name Value
R/W Description
15
IPR15
0
14
IPR14
0
13
IPR13
0
12
IPR12
0
R/W These bits set priority levels for the corresponding
R/W ^{interrupt source.}
R/W ^{0000: Priority level 0 (lowest)}
0001: Priority level 1
R/W _{0010: Priority level 2}
0011: Priority level 3
0100: Priority level 4
0101: Priority level 5
0110: Priority level 6
0111: Priority level 7
1000: Priority level 8
1001: Priority level 9
1010: Priority level 10
1011: Priority level 11
1100: Priority level 12
1101: Priority level 13
1110: Priority level 14
1111: Priority level 15 (highest)
11
IPR11
0
10
IPR10
0
9
IPR9
0
8
IPR8
0
R/W These bits set priority levels for the corresponding
R/W ^{interrupt source.}
R/W ^{0000: Priority level 0 (lowest)}
0001: Priority level 1
R/W _{0010: Priority level 2}
0011: Priority level 3
0100: Priority level 4
0101: Priority level 5
0110: Priority level 6
0111: Priority level 7
1000: Priority level 8
1001: Priority level 9
1010: Priority level 10
1011: Priority level 11
1100: Priority level 12
1101: Priority level 13
1110: Priority level 14
1111: Priority level 15 (highest)
Rev. 2.00, 09/04, page 80 of 720