HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 227

• Manufacturer Part Number: HD6417712BPV
• Description: MPU 1.5/3.3V 0K PB-FREE 256-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Ethernetr

Specifications of HD6417712BPV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, Ethernet, FIFO, SCI, SIO
• Peripherals: DMA, POR, WDT
• Number Of I /o: 24
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

5.1.1
Virtual Address Space: This LSI supports a 32-bit virtual address space that enables access to a
4-Gbyte address space. As shown in figures 5.2 and 5.3, the virtual address space is divided into
several areas. In privileged mode, a 4-Gbyte space comprising areas P0 to P4 are accessible. In
user mode, a 2-Gbyte space of U0 area is accessible, and a 16-Mbyte space of Uxy area is also
accessible if the DSP bit of the SR register is set to 1. Access to any area (excluding the U0 area
and Uxy area) in user mode will result in an address error.
If the MMU is enabled by setting the AT bit of the MMUCR register to 1, P0, P3, and U0 areas
can be used as any physical address area in 1- or 4-kbyte page units. By using an 8-bit address
space identifier, P0, P2, and U0 areas can be increased to up to 256 areas. Mapping from virtual
address to 29-bit physical address can be achieved by the TLB.
Process 1
MMU of This LSI
Physical
Memory
Process 1
Process 1
Process 2
Process 3
Figure 5.1 MMU Functions
Physical
Memory
Physical
Memory
(3)
(1)
Process 1
Process 2
Process 3
Process 1
Section 5 Memory Management Unit (MMU)
Rev. 1.00 Dec. 27, 2005 Page 183 of 932
Memory
Memory
Virtual
Virtual
MMU
MMU
REJ09B0269-0100
Physical
Memory
Physical
Memory
(4)
(2)