r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 942

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

Section 22 Flash Memory
22.4.4
When the realtime programming of the user MAT is emulated, RAMER sets the area of the user
MAT which is overlapped with a part of the on-chip RAM. The RAM emulation must be executed
in user mode or in user program mode.
For the division method of the user-MAT area, see table 22.7. In order to operate the emulation
function certainly, the target MAT of the RAM emulation must not be accessed immediately after
RAMER is programmed. If it is accessed, the normal access is not guaranteed.
Initial value:
Rev. 1.00 Sep. 21, 2007 Page 916 of 1124
REJ09B0402-0100
Bit
15 to 4 
3
2 to 0
R/W:
Bit:
Bit Name
RAMS
RAM[2:0]
RAM Emulation Register (RAMER)
15
R
0
-
14
R
0
-
13
Initial
Value
All 0
0
000
R
0
-
12
R
0
-
11
R
0
-
R/W
R
R/W
R/W
10
R
0
-
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
RAM Select
Sets whether the user MAT is emulated or not. When
RAMS = 1, all blocks of the user MAT are in the
programming/erasing protection state.
0: Emulation is not selected
1: Emulation is selected
User MAT Area Select
These bits are used with bit 3 to select the user-MAT
area to be overlapped with the on-chip RAM. (See table
22.7.)
R
9
0
-
Programming/erasing protection of all user-MAT
blocks is invalid
Programming/erasing protection of all user-MAT
blocks is valid
R
8
0
-
R
7
0
-
R
6
0
-
R
5
0
-
R
4
0
-
RAMS
R/W
3
0
R/W
2
0
RAM[2:0]
R/W
1
0
R/W
0
0