HD6417751RF240V Renesas Electronics America, HD6417751RF240V Datasheet - Page 1059

• 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: -

22.4
22.4.1
The internal bus (peripheral bus) for the peripheral modules that write data from CPU to the PCIC
registers operates in big endians. On the other hand, PCI bus operates in little endian. Therefore,
big/little endian conversion is required in PIO transfer, as shown in figure 22.17. The PCIC
supports two endian conversion modes, the BYTESWAP bit of the PCI control register (PCICR)
switching between these modes.
1. Byte data boundary mode: Big/little endian conversion is performed on the assumption that all
2. Word/longword (W/LW) boundary mode: Big/little endian conversion is performed according
Table 22.10 shows the access sizes supported by the conversion modes at the destination of
peripheral bus access. The local registers in the PCIC are always accessed in the word/longword
boundary mode regardless of the transfer mode.
Figure 22.18 shows the data alignment between peripheral bus and PCI bus in each boundary
mode.
data is on byte boundaries. (BYTESWAP = 1)
to the size of data accessed. (BYTESWAP = 0)
Peripheral bus
Big endian
Endians
Internal Bus (Peripheral Bus) Interface for Peripheral Modules
Figure 22.17 Endian Conversion Modes for Peripheral Bus
32 bits
32 bits
Little → big
Big → little
Rev.4.00 Oct. 10, 2008 Page 959 of 1122
32 bits
32 bits
22. PCI Controller (PCIC)
REJ09B0370-0400
Little endian
PCI bus