r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 197

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

7.3.2
The ITLB is used to translate a virtual address to a physical address in an instruction access.
Information in the address translation table located in the UTLB is cached into the ITLB. Figure
7.8 shows the ITLB configuration. The ITLB consists of four fully-associative type entries.
7.3.3
Figure 7.9 shows a flowchart of a memory access using the UTLB.
Instruction TLB (ITLB) Configuration
Address Translation Method
Notes: 1. The D and WT bits are not supported.
Entry 0
Entry 1
Entry 2
Entry 3
Figure 7.8 ITLB Configuration (TLB Compatible Mode)
2. There is only one PR bit, corresponding to the upper bit of the PR bits in the UTLB.
ASID[7:0]
ASID[7:0]
ASID[7:0]
ASID[7:0]
VPN[31:10]
VPN[31:10]
VPN[31:10]
VPN[31:10]
V
V
V
V
PPN[28:10]
PPN[28:10]
PPN[28:10]
PPN[28:10]
SZ[1:0]
SZ[1:0]
SZ[1:0]
SZ[1:0]
Rev.1.00 Jan. 10, 2008 Page 167 of 1658
SH
SH
SH
SH
7. Memory Management Unit (MMU)
C
C
C
C
PR
PR
PR
PR
REJ09B0261-0100