HD6417760BL200AV Renesas Electronics America, HD6417760BL200AV Datasheet - Page 144
HD6417760BL200AV
Manufacturer Part Number
HD6417760BL200AV
Description
SH4 7760, 17 X17 256BGA, LCDC, U
Manufacturer
Renesas Electronics America
Series
SuperH® SH7750r
Datasheet
1.D6417760BP200ADV.pdf
(1418 pages)
Specifications of HD6417760BL200AV
Core Processor
SH-4
Core Size
32-Bit
Speed
200MHz
Connectivity
Audio Codec, CAN, EBI/EMI, FIFO, I²C, MFI, MMC, SCI, Serial Sound, SIM, SPI, USB
Peripherals
DMA, LCD, POR, WDT
Number Of I /o
69
Program Memory Type
ROMless
Ram Size
48K x 8
Voltage - Supply (vcc/vdd)
1.4 V ~ 1.6 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
256-BGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
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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.
3.5.3
FPU exception handling is initiated in the following cases:
• FPU error (E): FPSCR.DN = 0 and a denormalized number is input
• Invalid operation (V): FPSCR.Enable.V = 1 and (instruction = FTRV or 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
These possibilities are shown in the individual instruction descriptions. All exception events that
originate in the FPU are assigned as the same exception event. The meaning of an exception is
determined by software by reading from FPSCR and interpreting the information it contains. If no
bits are set in the FPU exception cause field of FPSCR when one or more of bits O, U, I, and V (in
case of FTRV only) are set in the FPU exception enable field, this indicates that an actual
exception source is not generated. Also, the destination register is not changed by any FPU
exception handling operation.
Except for the above, the FPU disables exception handling. In every processing, the bit
corresponding to source V, Z, O, U, or I is set to 1, and a default value is generated as the
operation result.
• Invalid operation (V): qNaN is generated as the result.
• Division by zero (Z): Infinity with the same sign as the unrounded value is generated.
• Overflow (O):
Rev. 2.00 Feb. 12, 2010 Page 60 of 1330
REJ09B0554-0200
overflow
underflow
result
When rounding mode = RZ, the maximum normalized number, with the same sign as the
unrounded value, is generated.
When rounding mode = RN, infinity with the same sign as the unrounded value is generated.
FPU Exception Handling
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