HD64F7045F28V Renesas Electronics America, HD64F7045F28V Datasheet - Page 437

• Manufacturer Part Number: HD64F7045F28V
• Description: IC SH2 MCU FLASH 144QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7040r

Specifications of HD64F7045F28V

• 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 Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 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: -

access (mm) of the previous multiplier type instruction, the bus cycle of the MA is extended until
the mm ends. The extended MA becomes a single slot.
The ID of the instruction following a double-length instruction also stalls until one slot later.
Multiplier type instructions and instructions that access the multiply and accumulate calculation
registers have MA stages, so they also contend with IFs. Figure 7.18 shows an example of
multiplier access contention, but it does not address MA and IF contention.
7.2.4
When an instruction that will store the result of a DSP operation instruction is written immediately
after the DSP operation instruction is executed, the execution will be too late. To prevent this, a
stall cycle is inserted. For more information, see section 4.17.2, Single Data Transfers.
Figure 7.18 Example of Multiplier Access Contention—MAC.L and MAC.L Instructions
Next instruction
Contention between Memory Stores and DSP Operations
MAC.L
MAC.L
Slot
IF
ID
IF
EX
—
MA
ID
IF
MA
EX
—
mm
MA
ID
mm
EX
M
Rev. 5.00 Jun 30, 2004 page 421 of 512
mm mm
—
—
A
Section 7 Pipeline Operation
mm
MA
REJ09B0171-0500O
mm
...
mm mm