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參數(shù)資料
| 型號(hào)： | M34506M4-XXXFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, MICROCONTROLLER, PDSO20 |
| 封裝： | 5.30 X 12.60 MM, 1.27 MM PITCH, PLASTIC, SOP-20 |
| 文件頁(yè)數(shù)： | 52/114頁(yè) |
| 文件大小： | 836K |
| 代理商： | M34506M4-XXXFP |
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2
2-5
32180 Group User’s Manual (Rev.1.0)
CPU
2.3.5 Floating-point Status Register: FPSR (CR7)
0000
0
0000000
2
3
4
5
6
7
8
9
10
11
12
13
14
b15
1
b0
0
00000100000000
EV
DN
CE
CX
CU
CZ
CO
CV
RM
18
19
20
21
22
23
24
25
26
27
28
29
30
b31
17
b16
EU
EX
FS
FX
FU
FZ
0
FO
0
FV
EZ
EO
<After reset: H’0000 0100>
b
Bit Name
Function
R
W
0
FS
Reflects the logical sum of FU, FZ, FO and FV.
R
–
Floating-point Exception Summary Bit
1
FX
Set to "1" when an inexact exception occurs (if EIT processing is
R
W
Inexact Exception Flag
unexecuted (Note 1)). Once set, the flag retains the value "1" until
it is cleared to "0" in software.
2
FU
Set to "1" when an underflow exception occurs (if EIT processing is
R
W
Underflow Exception Flag
unexecuted (Note 1)). Once set, the flag retains the value "1" until
it is cleared to "0" in software.
3
FZ
Set to "1" when a zero divide exception occurs (if EIT processing is
R
W
Zero Divide Exception Flag
unexecuted (Note 1)). Once set, the flag retains the value "1" until
it is cleared to "0" in software.
4
FO
Set to "1" when an overflow exception occurs (if EIT processing is
R
W
Overflow Exception Flag
unexecuted (Note 1)). Once set, the flag retains the value "1" until
it is cleared to "0" in software.
5
FV
Set to "1" when an invalid operation exception occurs (if EIT processing
R
W
Invalid Operation Exception Flag
is unexecuted (Note 1)). Once set, the flag retains the value "1" until
it is cleared to "0" in software.
6–16
No function assigned. Fix to "0".
00
17
EX
0: Mask EIT processing to be executed when an inexact exception occurs.
R
W
Inexact Exception Enable Bit
1: Execute EIT processing when an inexact exception occurs.
18
EU
0: Mask EIT processing to be executed when an underflow exception
R
W
Underflow Exception Enable Bit
occurs.
1: Execute EIT processing when an underflow exception occurs.
19
EZ
0: Mask EIT processing to be executed when a zero divide exception
R
W
Zero Divide Exception Enable Bit
occurs.
1: Execute EIT processing when a zero divide exception occurs.
20
EO
0: Mask EIT processing to be executed when an overflow exception
R
W
Overflow Exception Enable Bit
occurs.
1: Execute EIT processing when an overflow exception occurs.
21
EV
0: Mask EIT processing to be executed when an invalid operation
R
W
Invalid Operation Exception Enable Bit
exception occurs.
1: Execute EIT processing when an invalid operation exception occurs.
22
No function assigned. Fix to "0".
00
23
DN
0: Handle the denormalized number as a denormalized number.
R
W
Denormalized Number Zero Flush Bit
1: Handle the denormalized number as zero.
(Note 2)
24
CE
0: No unimplemented operation exception occurred.
R (Note 3)
Unimplemented Operation
1: An unimplemented operation exception occurred. When the bit is
Exception Cause Bit
set to "1", the execution of an FPU operation instruction will clear it to "0".
25
CX
0: No inexact exception occurred.
R (Note 3)
Inexact Exception Cause Bit
1: An inexact exception occurred. When the bit is set to "1",
the execution of an FPU operation instruction will clear it to "0".
2.3 Control Registers
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M34506M2-XXXFP | 4-BIT, MROM, MICROCONTROLLER, PDSO20 |
| M34507E4FP | 4-BIT, OTPROM, MICROCONTROLLER, PDSO24 |
| M34507M2-XXXFP | 4-BIT, MROM, MICROCONTROLLER, PDSO24 |
| M34507M4-XXXFP | 4-BIT, MROM, MICROCONTROLLER, PDSO24 |
| M34507M2-XXXFP | 4-BIT, MROM, MICROCONTROLLER, PDSO24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M34507E4FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34507M2-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-BIT CISC SINGLE-CHIP MICROCOMPUTER 4500 SERIES |
| M34507M4-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34508G4FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34508G4GP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
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