R0K572030S000BE Renesas Electronics America, R0K572030S000BE Datasheet - Page 135

• Manufacturer Part Number: R0K572030S000BE
• Description: KIT DEV FOR SH7203
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K572030S000BE

• Contents: CPU Board, LCD Module, E10A-Lite Emulator, Cable, QuickStart Guide and CD-ROM
• Silicon Manufacturer: Renesas
• Kit Contents: Board
• Silicon Family Name: SH7203
• Silicon Core Number: R5S72030W200FP
• Tool / Board Applications: General Purpose MCU, MPU, DSP, DSC
• Mcu Supported Families: SH7203
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: SH7203
• Lead Free Status / Rohs Status: Compliant

3.5
3.5.1
FPU exceptions may be triggered by floating point operation instructions. The exception sources
are as follows:
• FPU error (E): When FPSCR.DN = 0 and a denormalized number is input (No error occurs in
• Invalid operation (V): In case of an invalid operation, such as NaN input
• Division by zero (Z): Division with a zero divisor
• Overflow (O): When the operation result overflows
• Underflow (U): When the operation result underflows
• Inexact exception (I): When overflow, underflow, or rounding occurs
The FPU exception cause field in FPSCR contains bits corresponding to all of above sources E, V,
Z, O, U, and I, and the FPU exception flag and enable fields in FPSCR contain bits corresponding
to sources V, Z, O, U, and I, but not E. Thus, FPU errors cannot be disabled.
When an FPU exception occurs, the corresponding bit in the FPU exception cause field is set to 1,
and 1 is added to the corresponding bit in the FPU exception flag field. When an FPU exception
does not occur, the corresponding bit in the FPU exception cause field is cleared to 0, but the
corresponding bit in the FPU exception flag field remains unchanged.
3.5.2
FPU exception handling is initiated in the following cases:
• FPU error (E): FPSCR.DN = 0 and a denormalized number is input (No error occurs in the
• Invalid operation (V): FPSCR.Enable.V = 1 and invalid operation
• Division by zero (Z): FPSCR.Enable.Z = 1 and division with a zero divisor
• Overflow (O): FPSCR.Enable.O = 1 and instruction with possibility of operation result
• Underflow (U): FPSCR.Enable.U = 1 and instruction with possibility of operation result
• Inexact exception (I): FPSCR.Enable.I = 1 and instruction with possibility of inexact operation
the SH2A-FPU)
SH2A-FPU)
overflow
underflow
result
FPU Exceptions
FPU Exception Sources
FPU Exception Handling
Rev. 3.00 Sep. 28, 2009 Page 103 of 1650
Section 3 Floating-Point Unit (FPU)
REJ09B0313-0300