R8A77850ANBGV Renesas Electronics America, R8A77850ANBGV Datasheet - Page 231

• Manufacturer Part Number: R8A77850ANBGV
• Description: IC SUPERH MPU ROMLESS 436-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R8A77850ANBGV

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 600MHz
• Connectivity: Audio Codec, MMC, Serial Sound, SCI, SIO, SPI, SSI
• Peripherals: DMA, POR, WDT
• Number Of I /o: 108
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1 V ~ 1.2 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 436-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

7.8
Setting the SE bit in PASCR to 1 changes mode from 29-bit address mode which handles the 29-
bit physical address space to 32-bit address extended mode which handles the 32-bit physical
address space.
7.8.1
In 32-bit address extended mode, the privileged space mapping buffer (PMB) is introduced. The
PMB maps virtual addresses in the P1 or P2 area which are not translated in 29-bit address mode
to the 32-bit physical address space. In areas which are target for address translation of the TLB
(UTLB/ITLB), upper three bits in the PPN field of the UTLB or ITLB are extended and then
addresses after the TLB translation can handle the 32-bit physical addresses.
As for the cache operation, P1 area is cacheable and P2 area is non-cacheable in the case of 29-bit
address mode, but the cache operation of both P1 and P2 area are determined by the C bit and WT
bit in the PMB in the case of 32-bit address mode.
Virtual address space
32-Bit Address Extended Mode
Overview of 32-Bit Address Extended Mode
P1 (0.5 Gbyte)
P2 (0.5 Gbyte)
P3 (0.5 Gbyte)
P4 (0.5 Gbyte)
Figure 7.26 Physical Address Space (32-Bit Address Extended Mode)
(2 Gbytes)
U0/P0
29-bit Physical address space
(Normal mode)
address space
0.5 Gbyte
29-bits
Virtual address space
P3 (0.5 Gbyte)
P4 (0.5 Gbyte)
(2 Gbytes)
(1 Gbyte)
P1/P2
U0/P0
Rev.1.00 Jan. 10, 2008 Page 199 of 1658
32-bit Physical address space
7. Memory Management Unit (MMU)
(Extended mode)
address space
4 Gbytes
REJ09B0261-0100
32-bit