HD6417751RF240V Renesas Electronics America, HD6417751RF240V Datasheet - Page 273

• Manufacturer Part Number: HD6417751RF240V
• Description: MPU 1.5/3.3V 0K PB-FREE 256-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7750r

Specifications of HD6417751RF240V

• Core Processor: SH-4
• Core Size: 32-Bit
• Speed: 240MHz
• Connectivity: EBI/EMI, FIFO, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 39
• Program Memory Type: ROMless
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-QFP Exposed Pad, 256-eQFP, 256-HQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

6.1
The floating-point unit (FPU) has the following features:
• Conforms to IEEE754 standard
• 32 single-precision floating-point registers (can also be referenced as 16 double-precision
• Two rounding modes: Round to Nearest and Round to Zero
• Two denormalization modes: Flush to Zero and Treat Denormalized Number
• Six exception sources: FPU Error, Invalid Operation, Divide By Zero, Overflow, Underflow,
• Comprehensive instructions: Single-precision, double-precision, graphics support, system
When the FD bit in SR is set to 1, the FPU cannot be used, and an attempt to execute an FPU
instruction will cause an FPU disable exception.
6.2
6.2.1
A floating-point number consists of the following three fields:
• Sign (s)
• Exponent (e)
• Fraction (f)
The FPU can handle single-precision and double-precision floating-point numbers, using the
formats shown in figures 6.1 and 6.2.
registers)
and Inexact
control
31
s
Overview
Data Formats
Floating-Point Format
30
Figure 6.1 Format of Single-Precision Floating-Point Number
e
Section 6 Floating-Point Unit
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f
6. Floating-Point Unit
REJ09B0370-0400
0