Section 9 Interrupt Controller (INTC)
Rev. 1.00 Oct. 01, 2007 Page 265 of 1956
REJ09B0256-0100
To prevent incorrect writing, this register can only be written to with bits 31 to 24 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
R
R
R
R
R
R
R
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
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:
Bit:
Initial value:
R/W:
−
− −
−
−
− −
−
− − − −
− − − −
−
− − − −
− − −
−
− − −
Bit Bit
Name
Initial
Value R/W Description
31 to 24 —
H'00
R/W
To write a value to bits 7 to 4, write H'A5 to them.
These bits are always read as 0.
23 to 8
—
All 0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
7 to 4
UIMASK
H'0
R/W
Interrupt Mask Level
Masks interrupts whose priority levels are lower than
the level set in the UIMASK bit.
3 to 0
—
All 0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
Procedure for Using User Interrupt Mask Level Register
This function is used to save time by disabling interrupts whose priorities are low when a high
priority interrupt is processed in the device driver.
Setting the interrupt mask level in USERIMASK disables interrupts having an equal or lower
priority level than the specified mask level. This function can disable less-urgent interrupts in a
task (such as device driver) operating in user mode to accelerate urgent processing.
USERIMASK is allocated to a different 64-Kbyte page than where the other INTC registers are
allocated. When accessing this register in user mode, translate the address through the MMU. In
the system that uses a multitasking OS, processes that can access USERIMASK must be
controlled by using memory protection functions of the MMU. When terminating the task or
switching to another task, be sure to clear USERIMASK to 0 before quitting the task. If the
UIMASK bits are left set to a non-zero value, interrupts which are not higher in priority than the
Summary of Contents for SH7763
Page 2: ...Rev 1 00 Oct 01 2007 Page ii of lxvi ...
Page 122: ...Section 2 Programming Model Rev 1 00 Oct 01 2007 Page 56 of 1956 REJ09B0256 0100 ...
Page 144: ...Section 3 Instruction Set Rev 1 00 Oct 01 2007 Page 78 of 1956 REJ09B0256 0100 ...
Page 170: ...Section 4 Pipelining Rev 1 00 Oct 01 2007 Page 104 of 1956 REJ09B0256 0100 ...
Page 282: ...Section 7 Caches Rev 1 00 Oct 01 2007 Page 216 of 1956 REJ09B0256 0100 ...
Page 378: ...Section 9 Interrupt Controller INTC Rev 1 00 Oct 01 2007 Page 312 of 1956 REJ09B0256 0100 ...
Page 514: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Oct 01 2007 Page 448 of 1956 REJ09B0256 0100 ...
Page 630: ...Section 13 PCI Controller PCIC Rev 1 00 Oct 01 2007 Page 564 of 1956 REJ09B0256 0100 ...
Page 710: ...Section 16 Clock Pulse Generator CPG Rev 1 00 Oct 01 2007 Page 644 of 1956 REJ09B0256 0100 ...
Page 732: ...Section 17 Watchdog Timer and Reset WDT Rev 1 00 Oct 01 2007 Page 666 of 1956 REJ09B0256 0100 ...
Page 752: ...Section 18 Power Down Mode Rev 1 00 Oct 01 2007 Page 686 of 1956 REJ09B0256 0100 ...
Page 772: ...Section 19 Timer Unit TMU Rev 1 00 Oct 01 2007 Page 706 of 1956 REJ09B0256 0100 ...
Page 824: ...Section 21 Compare Match Timer CMT Rev 1 00 Oct 01 2007 Page 758 of 1956 REJ09B0256 0100 ...
Page 1124: ...Section 26 I 2 C Bus Interface IIC Rev 1 00 Oct 01 2007 Page 1058 of 1956 REJ09B0256 0100 ...
Page 1350: ...Section 30 SIM Card Module SIM Rev 1 00 Oct 01 2007 Page 1284 of 1956 REJ09B0256 0100 ...
Page 1484: ...Section 33 Audio Codec Interface HAC Rev 1 00 Oct 01 2007 Page 1418 of 1956 REJ09B0256 0100 ...
Page 1560: ...Section 35 USB Host Controller USBH Rev 1 00 Oct 01 2007 Page 1494 of 1956 REJ09B0256 0100 ...
Page 1720: ...Section 37 LCD Controller LCDC Rev 1 00 Oct 01 2007 Page 1654 of 1956 REJ09B0256 0100 ...
Page 2025: ......
Page 2026: ...SH7763 Hardware Manual ...