R5S77641 datasheet(10/1752 Pages) RENESAS

Part #	R5S77641

Description	Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

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10 / 1752 page

Rev. 1.00 Nov. 22, 2007 Page x of lvi

5.2.3

Interrupt Event Register (INTEVT)........................................................................ 98

5.2.4

Non-Support Detection Exception Register (EXPMASK) ..................................... 99

5.3

Exception Handling Functions........................................................................................... 101

5.3.1

Exception Handling Flow ..................................................................................... 101

5.3.2

Exception Handling Vector Addresses ................................................................. 101

5.4

Exception Types and Priorities .......................................................................................... 102

5.5

Exception Flow ..................................................................................................................104

5.5.1

Exception Flow..................................................................................................... 104

5.5.2

Exception Source Acceptance............................................................................... 106

5.5.3

Exception Requests and BL Bit ............................................................................ 107

5.5.4

Return from Exception Handling.......................................................................... 107

5.6

Description of Exceptions.................................................................................................. 108

5.6.1

Resets.................................................................................................................... 108

5.6.2

General Exceptions ............................................................................................... 110

5.6.3

Interrupts............................................................................................................... 126

5.6.4

Priority Order with Multiple Exceptions .............................................................. 127

5.7

Usage Notes ....................................................................................................................... 129

Section 6 Floating-Point Unit (FPU)................................................................. 131

6.1

Features.............................................................................................................................. 131

6.2

Data Formats...................................................................................................................... 132

6.2.1

Floating-Point Format........................................................................................... 132

6.2.2

Non-Numbers (NaN) ............................................................................................ 135

6.2.3

Denormalized Numbers ........................................................................................ 136

6.3

Register Descriptions ......................................................................................................... 137

6.3.1

Floating-Point Registers ....................................................................................... 137

6.3.2

Floating-Point Status/Control Register (FPSCR) ................................................. 139

6.3.3

Floating-Point Communication Register (FPUL) ................................................. 142

6.4

Rounding............................................................................................................................ 143

6.5

Floating-Point Exceptions.................................................................................................. 144

6.5.1

General FPU Disable Exceptions and Slot FPU Disable Exceptions ................... 144

6.5.2

FPU Exception Sources ........................................................................................ 144

6.5.3

FPU Exception Handling ...................................................................................... 145

6.6

Graphics Support Functions............................................................................................... 146

6.6.1

Geometric Operation Instructions......................................................................... 146

6.6.2

Pair Single-Precision Data Transfer...................................................................... 147

Section 7 Memory Management Unit (MMU).................................................. 149

7.1

Overview of MMU ............................................................................................................ 150

7.1.1

Address Spaces ..................................................................................................... 152

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