r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 277
r8a77850anbg
Manufacturer Part Number
r8a77850anbg
Description
Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R8A77850ANBG.pdf
(1692 pages)
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Part Number:
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9.2.1
RAMCR controls the protective functions in the on-chip memory.
When updating RAMCR, please follow limitation described at section 8.2.4, On-Chip Memory
Control Register (RAMCR).
Bit
31to10
9
8
7
Initial value :
Initial value :
R/W:
R/W:
Bit :
Bit :
On-Chip Memory Control Register (RAMCR)
Bit Name
—
RMD
RP
IC2W
31
15
R
R
0
0
30
14
R
R
0
0
29
13
Initial
Value
All 0
0
0
0
R
R
0
0
28
12
R
R
0
0
27
11
R
R
0
0
R/W
R
R/W
R/W
R/W
26
10
R
R
0
0
Description
Reserved
For read/write in these bits, refer to General
Precautions on Handling of Product.
On-Chip Memory Access Mode
Specifies the right of access to the on-chip memory
from the virtual address space.
0: An access in privileged mode is allowed.
1: An access in user/ privileged mode is allowed.
On-Chip Memory Protection Enable
Selects whether or not to use the protective functions
using ITLB and UTLB for accessing the on-chip
memory from the virtual address space.
0: Protective functions are not used.
1: Protective functions are used.
For further details, refer to section 9.4, On-Chip
Memory Protective Functions.
IC Two-Way Mode
For further details, refer to section 8.4.3, IC Two-Way
Mode.
RMD
R/W
(An address error exception occurs in user mode.)
25
R
0
9
0
R/W
RP
24
R
0
8
0
IC2W OC2W
R/W
23
R
0
7
0
R/W
Rev.1.00 Jan. 10, 2008 Page 247 of 1658
22
R
0
6
0
ICWPD
R/W
21
R
0
5
0
20
R
R
0
4
0
19
R
R
0
3
0
9. On-Chip Memory
REJ09B0261-0100
18
R
R
0
2
0
17
R
R
0
1
0
16
R
R
0
0
0
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