SH7785 datasheet(10/1692 Pages) RENESAS

10 / 1692 page

Rev.1.00 Jan. 10, 2008 Page x of xxx

REJ09B0261-0100

5.2.2

Exception Event Register (EXPEVT)................................................................... 91

5.2.3

Interrupt Event Register (INTEVT)...................................................................... 92

5.2.4

Non-Support Detection Exception Register (EXPMASK) ................................... 93

5.3

Exception Handling Functions............................................................................................. 95

5.3.1

Exception Handling Flow ..................................................................................... 95

5.3.2

Exception Handling Vector Addresses ................................................................. 95

5.4

Exception Types and Priorities ............................................................................................ 96

5.5

Exception Flow .................................................................................................................... 98

5.5.1

Exception Flow..................................................................................................... 98

5.5.2

Exception Source Acceptance ............................................................................ 100

5.5.3

Exception Requests and BL Bit .......................................................................... 101

5.5.4

Return from Exception Handling........................................................................ 101

5.6

Description of Exceptions.................................................................................................. 102

5.6.1

Resets.................................................................................................................. 102

5.6.2

General Exceptions............................................................................................. 104

5.6.3

Interrupts............................................................................................................. 120

5.6.4

Priority Order with Multiple Exceptions ............................................................ 121

5.7

Usage Notes ....................................................................................................................... 123

Section 6 Floating-Point Unit (FPU) .............................................................................. 125

6.1

Features.............................................................................................................................. 125

6.2

Data Formats...................................................................................................................... 126

6.2.1

Floating-Point Format......................................................................................... 126

6.2.2

Non-Numbers (NaN) .......................................................................................... 129

6.2.3

Denormalized Numbers ...................................................................................... 130

6.3

Register Descriptions ......................................................................................................... 131

6.3.1

Floating-Point Registers ..................................................................................... 131

6.3.2

Floating-Point Status/Control Register (FPSCR) ............................................... 133

6.3.3

Floating-Point Communication Register (FPUL) ............................................... 136

6.4

Rounding............................................................................................................................ 137

6.5

Floating-Point Exceptions.................................................................................................. 138

6.5.1

General FPU Disable Exceptions and Slot FPU Disable Exceptions ................. 138

6.5.2

FPU Exception Sources ...................................................................................... 138

6.5.3

FPU Exception Handling .................................................................................... 139

6.6

Graphics Support Functions............................................................................................... 140

6.6.1

Geometric Operation Instructions....................................................................... 140

6.6.2

Pair Single-Precision Data Transfer.................................................................... 141

Section 7 Memory Management Unit (MMU) ............................................................ 143

7.1

Overview of MMU ............................................................................................................ 144

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