HD6417760BL200AV Renesas Electronics America, HD6417760BL200AV Datasheet - Page 150

• Manufacturer Part Number: HD6417760BL200AV
• Description: SH4 7760, 17 X17 256BGA, LCDC, U
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7750r

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: -

Example: If the double-precision FSUB instruction (FSUB DR0, DR2) is executed with input
data DR0 = H'C1F00000 80000000, DR2 = H'C4B250D2 0CC1FB74, and FPSCR = H'000C0001,
the correct operation result is DR2 = H'C4B250D2 0CC1F973, and FPSCR.Flag.I and
FPSCR.Cause.I should be set to 1. However, the result actually produced by the FPU is DR2 =
H'C4B250D2 0CC1F974, and FPSCR.Flag.I and FPSCR.Cause.I are not set to 1.
Effects: In addition to the problem described above, the numerical size of the result of the
operation may contain a minute operation error equivalent to 1/256 of the LSB of the mantissa of
the unrounded value. This is can be described as within the scope of the subsequent rounding
mechanism. Strictly speaking, it consists of the following.
a: The infinite-precision operation result
b: The closest expressible value less than a
c: The closest expressible value greater than a
d: The operation result when a is rounded correctly
e: The operation result when a is rounded by the FPU
• The rounding error when rounding is performed correctly in Round to Nearest mode is:
• The rounding error when rounding is performed correctly in Round to Zero mode is:
Rev. 2.00 Feb. 12, 2010 Page 66 of 1330
REJ09B0554-0200
0 ≤ | d − a | ≤ (1/2) × (c − b)
And the rounding error when rounding is performed by the FPU is:
0 ≤ | e − a | < (129/256) × (c − b)
If c – b is considered the LSB of the mantissa, the range of rounding error is equivalent to
1/256 of the LSB of the mantissa of the correctly rounded value.
(−1) × (c − b) < | d |−| a | ≤ 0
And the rounding error when rounding is performed by the FPU is:
(−1) × (c − b) < | e |−| a | < (1/256) × (c − b)
If c – b is considered the LSB of the mantissa, the range of rounding error is equivalent to
1/256 of the LSB of the mantissa of the correctly rounded value.