SH7201 datasheet(10/1196 Pages) RENESAS

Part #	SH7201

Description	32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

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Manufacturer	RENESAS [Renesas Technology Corp]

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10 / 1196 page

Rev. 2.00 Sep. 07, 2007 Page x of xxviii

Section 3 Floating-Point Unit (FPU)................................................................... 63

3.1

Features................................................................................................................................ 63

3.2

Data Formats........................................................................................................................ 63

3.2.1

Floating-Point Format............................................................................................. 63

3.2.2

Non-Numbers (NaN) .............................................................................................. 65

3.2.3

Denormalized Numbers .......................................................................................... 66

3.3

Register Descriptions ...........................................................................................................67

3.3.1

Floating-Point Registers ......................................................................................... 67

3.3.2

Floating-Point Status/Control Register (FPSCR) ................................................... 68

3.3.3

Floating-Point Communication Register (FPUL) ................................................... 69

3.4

Rounding.............................................................................................................................. 70

3.5

Floating-Point Exceptions.................................................................................................... 71

3.5.1

FPU Exception Sources .......................................................................................... 71

3.5.2

FPU Exception Handling ........................................................................................ 71

Section 4 Clock Pulse Generator (CPG) ............................................................. 73

4.1

Features................................................................................................................................ 73

4.2

Input/Output Pins................................................................................................................. 76

4.3

Clock Operating Modes ....................................................................................................... 77

4.4

Register Descriptions ...........................................................................................................83

4.4.1

Frequency Control Register (FRQCR) ................................................................... 83

4.4.2

CKIO Control Register (CKIOCR) ........................................................................ 86

4.5

Changing the Frequency ...................................................................................................... 87

4.5.1

Changing the Multiplication Rate ........................................................................... 87

4.5.2

Changing the Division Ratio................................................................................... 88

4.6

Notes on Board Design ........................................................................................................ 88

4.6.1

Note on Inputting External Clock ........................................................................... 88

4.6.2

Note on Using Crystal Resonator ........................................................................... 89

4.6.3

Note on Resonator .................................................................................................. 89

4.6.4

Note on Using a PLL Oscillation Circuit................................................................ 90

4.6.5

Note on Changing the Multiplication Rate ............................................................. 90

Section 5 Exception Handling ............................................................................. 91

5.1

Overview.............................................................................................................................. 91

5.1.1

Types of Exception Handling and Priority ............................................................. 91

5.1.2

Exception Handling Operations.............................................................................. 93

5.1.3

Exception Handling Vector Table .......................................................................... 95

5.2

Resets................................................................................................................................... 97

5.2.1

Input/Output Pins.................................................................................................... 97

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