参数资料
型号: M32180F8TFP
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP240
封装: 32 X 32 MM, 0.50 MM PITCH, PLASTIC, QFP-240
文件页数: 78/139页
文件大小: 3774K
代理商: M32180F8TFP
2
2-6
32180 Group User’s Manual (Rev.1.0)
CPU
26
CU
0: No underflow exception occurred
R (Note 3)
Underflow Exception Cause Bit
1: An underflow exception occurred. When the bit is set to "1",
the execution of an FPU operation instruction will clear it to "0".
27
CZ
0: No zero divide exception occurred.
R (Note 3)
Zero Divide Exception Cause Bit
1: A zero divide exception occurred. When the bit is set to "1",
the execution of an FPU operation instruction will clear it to "0".
28
CO
0: No overflow exception occurred.
R (Note 3)
Overflow Exception Cause Bit
1: An overflow exception occurred. When the bit is set to "1",
the execution of an FPU operation instruction will clear it to "0".
29
CV
0: No invalid operation exception occurred.
R (Note 3)
Invalid Operation Exception Cause Bit
1: An invalid operation exception occurred. When the bit is set to "1",
the execution of an FPU operation instruction will clear it to "0".
30, 31
RM
00: Round to nearest
R
W
Rounding Mode Selection Bit
01: Round toward Zero
10: Round toward + Infinity
11: Round toward – Infinity
Note 1: The phrase “If EIT processing unexecuted” means whenever one of the exceptions occurs, enable bits 17 to 21 are set to
"0" which masks the EIT processing so that it cannot be executed. If two exceptions occur at the same time and their
corresponding exception enable bits are set differently (one enabled, and the other masked), EIT processing is executed. In
this case, these two flags do not change state regardless of the enable bits settings.
Note 2: If a denormalized number is given to the operand when DN = "0", an unimplemented exception occurs.
Note 3: This bit is cleared by writing "0". Writing "1" has no effect (the bit retains the value it had before the write).
2.3 Control Registers
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