2. Programming Model
Rev.1.00 Jan. 10, 2008 Page 34 of 1658
REJ09B0261-0100
Bit Bit
Name
Initial
Value R/W Description
27 to 16 —
All 0
R
Reserved
For details on reading/writing this bit, see General
Precautions on Handling of Product.
15
FD
0
R/W
FPU Disable Bit
When this bit is set to 1 and an FPU instruction is not in
a delay slot, a general FPU disable exception occurs.
When this bit is set to 1 and an FPU instruction is in a
delay slot, a slot FPU disable exception occurs. (FPU
instructions: H'F
***
instructions and LDS (.L)/STS(.L)
instructions using FPUL/FPSCR)
14 to 10 —
All 0
R
Reserved
For details on reading/writing this bit, see General
Precautions on Handling of Product.
9 M
0 R/W
M
Bit
Used by the DIV0S, DIV0U, and DIV1 instructions.
8 Q
0 R/W
Q
Bit
Used by the DIV0S, DIV0U, and DIV1 instructions.
7 to 4
IMASK
1111
R/W
Interrupt Mask Level Bits
An interrupt whose priority is equal to or less than the
value of the IMASK bits is masked. It can be chosen by
CPU operation mode register (CPUOPM) whether the
level of IMASK is changed to accept an interrupt or not
when an interrupt is occurred. For details, see appendix
A, CPU Operation Mode Register (CPUOPM).
3, 2
—
All 0
R
Reserved
For details on reading/writing this bit, see General
Precautions on Handling of Product.
1 S
0 R/W
S
Bit
Used by the MAC instruction.
0 T
0 R/W
T
Bit
Indicates true/false condition, carry/borrow, or
overflow/underflow.
For details, see section 3, Instruction Set.
Summary of Contents for SH7781
Page 4: ...Rev 1 00 Jan 10 2008 Page iv of xxx REJ09B0261 0100 ...
Page 74: ...2 Programming Model Rev 1 00 Jan 10 2008 Page 44 of 1658 REJ09B0261 0100 ...
Page 272: ...8 Caches Rev 1 00 Jan 10 2008 Page 242 of 1658 REJ09B0261 0100 ...
Page 376: ...10 Interrupt Controller INTC Rev 1 00 Jan 10 2008 Page 346 of 1658 REJ09B0261 0100 ...
Page 694: ...13 PCI Controller PCIC Rev 1 00 Jan 10 2008 Page 664 of 1658 REJ09B0261 0100 ...
Page 762: ...14 Direct Memory Access Controller DMAC Rev 1 00 Jan 10 2008 Page 732 of 1658 REJ09B0261 0100 ...
Page 788: ...15 Clock Pulse Generator CPG Rev 1 00 Jan 10 2008 Page 758 of 1658 REJ09B0261 0100 ...
Page 828: ...17 Power Down Mode Rev 1 00 Jan 10 2008 Page 798 of 1658 REJ09B0261 0100 ...
Page 846: ...18 Timer Unit TMU Rev 1 00 Jan 10 2008 Page 816 of 1658 REJ09B0261 0100 ...
Page 1292: ...24 Multimedia Card Interface MMCIF Rev 1 00 Jan 10 2008 Page 1262 of 1658 REJ09B0261 0100 ...
Page 1326: ...25 Audio Codec Interface HAC Rev 1 00 Jan 10 2008 Page 1296 of 1658 REJ09B0261 0100 ...
Page 1482: ...28 General Purpose I O Ports GPIO Rev 1 00 Jan 10 2008 Page 1452 of 1658 REJ09B0261 0100 ...
Page 1538: ...30 User Debugging Interface H UDI Rev 1 00 Jan 10 2008 Page 1508 of 1658 REJ09B0261 0100 ...
Page 1688: ...Appendix Rev 1 00 Jan 10 2008 Page 1658 of 1658 REJ09B0261 0100 ...
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Page 1692: ...SH7785 Hardware Manual ...