HD6417751RF240V Renesas Electronics America, HD6417751RF240V Datasheet - Page 286
HD6417751RF240V
Manufacturer Part Number
HD6417751RF240V
Description
MPU 1.5/3.3V 0K PB-FREE 256-QFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7750r
Datasheet
1.D6417751RBP200DV.pdf
(1226 pages)
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
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6417751RF240V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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6. Floating-Point Unit
• Double-precision
Workarounds
1. Use FPSCR.RM = 01, that is to say Round to Zero rather than Round to Nearest mode.
2. Use FPSCR.RM = 00, that is to say Round to Nearest mode, and set the enable field to 1 to
6.7.2
When the maximum error produced by the FIPR or FTRV instruction exceeds the maximum value
expressible as a normalized number (H'7F7FFFFF), the overflow flag may be set, even through
the operation result is a positive or negative zero (H'00000000 or H'80000000).
Example: The operation result (FR7) after executing the instruction FIPR FV4, FV0 is
H'00000000 (positive zero), but the overflow flag may be set nevertheless.
FPSCR = H'00040001
FR0 = H'FF7EF631 , FR1 = H80000000 , FR2 = H'8087F451 , FR3 = H'7F7EF631
FR4 = H'7F7EF631 , FR5 = H'0087F451 , FR6 = H'7F7EF631 , FR7 = H'7F7EF631
Workaround: Avoid using the FIPR and FTRV instructions, and use the FADD, FMUL, and
FMAC instructions instead.
Rev.4.00 Oct. 10, 2008 Page 186 of 1122
REJ09B0370-0400
b. FPU
When FPSCR.RM = 00 (Round to Nearest) and FPSCR.PR = 1 (double-precision), and the
FDIV instruction (H'001FFFFF FFFFFFFF / H'40000000 00000000) is executed.
a. According to IEEE754 standard
b. FPU
enable generation of inexact exceptions so that the exception handling routine can be used to
check whether or not an underflow has occurred.
Operation result: H'00800000
FPSCR: H'00041004
Operation result: H'00100000 00000000
FPSCR: H'000C300C
Operation result: H'00100000 00000000
FPSCR: H'000C1004
Setting of Overflow Flag by FIPR or FTRV Instruction
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