HD6417751RF240V Renesas Electronics America, HD6417751RF240V Datasheet - Page 338

• Manufacturer Part Number: HD6417751RF240V
• Description: MPU 1.5/3.3V 0K PB-FREE 256-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7750r

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: -

8. Pipelining
8.4
Usage Notes
The following are additional notes on pipeline operation and the method of calculating the number
of clock cycles.
The number of states (I clock cycles) required for stages where an external bus access, etc., occurs
may include an increased number of cycles, in addition to the number of memory access cycles set
by the bus state controller (BSC), etc.
For example, the occurrence of the following may result in idle cycles as observed from the
external bus.
1. Transfer of data from the logical address bus to the physical address bus
2. Transfer of data between buses using different operation clocks
The stages where external memory access occurs include some instruction fetch (I) and some
memory access (MA) stages.
Rev.4.00 Oct. 10, 2008 Page 238 of 1122
REJ09B0370-0400