HD6417750RF200DV Renesas Electronics America, HD6417750RF200DV Datasheet - Page 329
HD6417750RF200DV
Manufacturer Part Number
HD6417750RF200DV
Description
MPU 1.5/3.3V 0K I-TEMP PB-FREE 2
Manufacturer
Renesas Electronics America
Series
SuperH® SH7750r
Datasheet
1.D6417750RBP240DV.pdf
(1164 pages)
Specifications of HD6417750RF200DV
Core Processor
SH-4
Core Size
32-Bit
Speed
200MHz
Connectivity
EBI/EMI, FIFO, SCI, SmartCard
Peripherals
DMA, POR, WDT
Number Of I /o
28
Program Memory Type
ROMless
Ram Size
48K x 8
Voltage - Supply (vcc/vdd)
1.35 V ~ 1.6 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
208-QFP Exposed Pad, 208-eQFP, 208-HQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
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The instruction execution sequence is expressed as a combination of the execution patterns shown
in figure 8.2. One instruction is separated from the next by the number of machine cycles for its
issue rate. Normally, execution, data access, and write-back stages cannot be overlapped onto the
same stages of another instruction; the only exception is when two instructions are executed in
parallel under parallel-executability conditions. Refer to (a) through (d) in figure 8.3 for some
simple examples.
Latency is the interval between issue and completion of an instruction, and is also the interval
between the execution of two instructions with an interdependent relationship. When there is
interdependency between two instructions fetched simultaneously, the latter of the two is stalled
for the following number of cycles:
• (Latency) cycles when there is flow dependency (read-after-write)
• (Latency - 1) or (latency - 2) cycles when there is output dependency (write-after-write)
• 5 or 2 cycles when there is anti-flow dependency (write-after-read), as in the following cases:
In the case of flow dependency, latency may be exceptionally increased or decreased, depending
on the combination of sequential instructions (figure 8.3 (e)).
• When a floating-point (FP) computation is followed by an FP register store, the latency of the
• If there is a load of the shift amount immediately before an SHAD/SHLD instruction, the
• If an instruction with a latency of less than 2 cycles, including write-back to an FP register, is
The number of cycles in a pipeline stall due to flow dependency will vary depending on the
combination of interdependent instructions or the fetch timing (see figure 8.3. (e)).
Output dependency occurs when the destination operands are the same in a preceding FE group
instruction and a following LS group instruction.
For the stall cycles of an instruction with output dependency, the longest latency to the last write-
back among all the destination operands must be applied instead of “latency” (see figure 8.3 (f)).
A stall due to output dependency with respect to FPSCR, which reflects the result of an FP
⎯ Single/double-precision FDN, FSQRT is the preceding instruction (latency – 1) cycles
⎯ The other FE group is the preceding instruction (latency – 2) cycles
⎯ FTRV is the preceding instruction (5 cycle)
⎯ A double-precision FADD, FSUB, or FMUL is the preceding instruction (2 cycles)
FP computation may be decreased by 1 cycle.
latency of the load is increased by 1 cycle.
followed by a double-precision FP instruction, FIPR, or FTRV, the latency of the first
instruction is increased to 2 cycles.
Rev.7.00 Oct. 10, 2008 Page 243 of 1074
Section 8 Pipelining
REJ09B0366-0700
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