HD6417041AVF16V Renesas Electronics America, HD6417041AVF16V Datasheet - Page 473

• Manufacturer Part Number: HD6417041AVF16V
• Description: IC SUPERH MCU ROMLESS 144QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7040r

Specifications of HD6417041AVF16V

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 28.7MHz
• Connectivity: EBI/EMI, SCI
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 98
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

1. When a MAC.L instruction is located immediately after another MAC.L instruction
MAC.L
MAC.L
MAC.L
MAC.L
When the second MA of the MAC.L instruction contends with the mm produced by the
previous multiplication instruction, the MA bus cycle is extended until the mm ends (the M—
A shown in the dotted line box in figure 7.44) to create a single slot. When two or more
instructions that do not use the multiplier occur between two MAC.L instructions, the stall
caused by multiplier contention between MAC.L instructions is eliminated.
Sometimes consecutive MAC.Ls may have less multiplier contention even when there is
misalignment of instruction execution caused by MA and IF contention. Figure 7.45 illustrates
a case of this type, assuming MA and IF contention.
Other instruction
Other instruction
Third instruction
Figure 7.44 MAC.L Instruction Immediately After Another MAC.L Instruction
......
if
MAC.L
MAC.L
MAC.L
MAC.L
......
......
ID
IF
Figure 7.45 Consecutive MAC.Ls with Misalignment
EX
—
IF
IF
MA
ID
if
ID
ID
IF
IF
MA
EX
—
EX
EX
—
—
mm
MA
MA
MA
—
ID
ID
IF
IF
mm
MA
MA
EX
—
EX
ID
IF
—
ID
IF
mm
M——A mm mm mm
mm
mm
EX
MA WB
MA
—
EX MA WB
ID
ID
mm
mm
mm
EX
EX MA MA mm mm
—
—
M————A mm mm
MA
Rev. 5.00 Jun 30, 2004 page 457 of 512
mm
mm
ID
—
EX —
mm
mm
M————A mm mm mm
—
MA ......
Section 7 Pipeline Operation
mm
—
MA
REJ09B0171-0500O
mm mm
mm mm
: Slot
: Slot
: Slot
mm