r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 205

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

Internal resource access
VA is
in P4 area
Data TLB protection
violation exception
Figure 7.14 Flowchart of Memory Access Using UTLB (TLB Extended Mode)
Data TLB multiple
Data TLB miss
hit exception
exception
0
VA is
in P2 area
EPR[2]?
0
1
R/W?
R
1
0 (User)
CCR.OCE?
CCR.CB?
(Non-cacheable)
Memory access
Data access to virtual address (VA)
0
1
0
VA is
in P1 area
EPR[1]?
W
1
No
0
0
D?
in copy-back mode
VPNs match
CCR.OCE?
1
CCR.WT?
and V = 1
Cache access
0
Yes
1
1
Initial page write
EPR[4]?
Rev.1.00 Jan. 10, 2008 Page 175 of 1658
exception
W
VA is in P0, U0,
or P3 area
1
7. Memory Management Unit (MMU)
No
0
No
No
No
0
No
R/W?
in write-through mode
and (MMUCR.SV = 0 or
ASIDs match, and
Cache access
CCR.OCE = 1
MMUCR.AT = 1
entry matches
C = 1 and
VPNs match,
SR.MD = 0)
Only one
SR.MD?
WT?
SH = 0
V = 1
EPR[5]?
1
Yes
Yes
Yes
Yes
Yes
1 (Privileged)
R
REJ09B0261-0100
1
Data TLB protection
violation exception
0