Section 10 Interrupt Controller (INTC)
Rev.1.00 Dec. 13, 2005 Page 273 of 1286
REJ09B0158-0100
10.3.8 User
Interrupt
Mask
Level Register (USERIMASK)
USERIMASK is a 32-bit readable and conditionally writable register that sets the acceptable
interrupt level. When addresses in area 7 are accessed by using the MMU’s address translation
function, USERIMASK can be accessed in user mode. Since only USERIMASK is allocated to
the 64-Kbyte page (other INTC registers are allocated to a different area), it can be set to be
accessible in user mode.
Interrupts with priority levels lower than the level set in the UIMASK bits are masked. When the
value H'F is set in the UIMASK bit, all interrupts other than the NMI are masked.
Interrupts with priority levels higher than the level set in the UIMASK bits are accepted under the
following conditions.
•
The corresponding interrupt mask bit in the interrupt mask register is cleared to 0 (the interrupt
is enabled).
•
The priority level setting in the IMASK bits in also SR is lower than that of the interrupt.
Even if an interrupt is accepted, the UIMASK value does not change.
USERIMASK is initialized to H'0000 0000 (all interrupts are enabled) on return from a power-on
reset or manual reset.
To prevent incorrect writing, the value written to bits 31 to 24 must always be set to H'A5.
16
17
18
19
20
21
22
23
24
25
26
27
28
29
31
30
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
WKEY (H'A5)
R
R
R
R
R
R
R
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit:
Initial value:
R/W:
0
1
2
3
4
5
6
7
8
9
10
11
12
13
15
14
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
UIMASK
R
R
R
R
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
Bit:
Initial value:
R/W:
Summary of Contents for SH7780 Series
Page 2: ...Rev 1 00 Dec 13 2005 Page ii of l ...
Page 28: ...Rev 1 00 Dec 13 2005 Page xxviii of l ...
Page 50: ...Rev 1 00 Dec 13 2005 Page l of l ...
Page 82: ...Section 1 Overview Rev 1 00 Dec 13 2005 Page 32 of 1286 REJ09B0158 0100 ...
Page 122: ...Section 3 Instruction Set Rev 1 00 Dec 13 2005 Page 72 of 1286 REJ09B0158 0100 ...
Page 146: ...Section 4 Pipelining Rev 1 00 Dec 13 2005 Page 96 of 1286 REJ09B0158 0100 ...
Page 196: ...Section 6 Floating Point Unit FPU Rev 1 00 Dec 13 2005 Page 146 of 1286 REJ09B0158 0100 ...
Page 292: ...Section 9 L Memory Rev 1 00 Dec 13 2005 Page 242 of 1286 REJ09B0158 0100 ...
Page 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
Page 674: ...Section 15 Clock Pulse Generator CPG Rev 1 00 Dec 13 2005 Page 624 of 1286 REJ09B0158 0100 ...
Page 692: ...Section 16 Watchdog Timer and Reset Rev 1 00 Dec 13 2005 Page 642 of 1286 REJ09B0158 0100 ...
Page 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
Page 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
Page 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
Page 1184: ...Section 29 User Break Controller UBC Rev 1 00 Dec 13 2005 Page 1134 of 1286 REJ09B0158 0100 ...
Page 1266: ...Section 31 Electrical Characteristics Rev 1 00 Dec 13 2005 Page 1216 of 1286 REJ09B0158 0100 ...
Page 1328: ...Appendix Rev 1 00 Dec 13 2005 Page 1278 of 1286 REJ09B0158 0100 ...
Page 1336: ...Rev 1 00 Dec 13 2005 Page 1286 of 1286 REJ09B0158 0100 ...
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Page 1340: ...SH7780 Hardware Manual ...