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M16C/62P Group (M16C/62P, M16C/62PT)
22.1 Memory Map
The flash memory contains the user ROM area and the boot ROM area. The user ROM area has space to
store the microcomputer operating program in single-chip mode or memory expansion mode and a sepa-
rate 4-Kbyte space as the block A. Figure 22.1 shows a block diagram of the flash memory.
The user ROM area is divided into several blocks, each of which can be protected (locked) from program or
erase. The user ROM area can be rewritten in CPU rewrite, standard serial I/O and parallel I/O modes.
Block A is enabled for use by setting the PM10 bit in the PM1 register to "1" (block A enabled, CS2 area at
addresses 10000h to 26FFFh).
The boot ROM area is located at the same addresses as the user ROM area. It can only be rewritten in
parallel I/O mode (refer to 22.1.1 Boot Mode). A program in the boot ROM area is executed after a
hardware reset occurs while an "H" signal is applied to the CNVSS and P5_0 pins and an "L" signal is
applied to the P5_5 pin (refer to 22.1.1 Boot Mode). A program in the user ROM area is executed after a
hardware reset occurs while an "L" signal is applied to the CNVSS pin. However, the boot ROM area cannot
be read.
00F000h
00FFFFh
080000h
08FFFFh
090000h
09FFFFh
0A0000h
0AFFFFh
0B0000h
0BFFFFh
0C0000h
0CFFFFh
0D0000h
0DFFFFh
0E0000h
0EFFFFh
0F0000h
0FFFFFh
NOTES:
1. The boot ROM area can only be rewritten in parallel input/output mode.
2. To specify a block, use an even address in that block.
3. Shown here is a block diagram during single-chip mode.
4. Block A can be made usable by setting the PM10 bit in the PM1 register to "1" (block A enabled, CS2 area allocated at addresses 10000h to 26FFFh).
Block A cannot be erased by the Erase All Unlocked Block command. Use the Block Erase command to erase it.
Figure 22.1 Flash Memory Block Diagram
R
e
. v
2
3 .
0
S
e
p
0
, 1
2
0
0
4
R
E
J
0
9
B
0
1
8
5
0 -
2
3
0
Z
Block A : 4 Kbytes
Block 12 : 64 Kbytes
Block 11 : 64 Kbytes
Block 10 : 64 Kbytes
Block 9 : 64 Kbytes
Block 8 : 64 Kbytes
Block 7 : 64 Kbytes
Block 6 : 64 Kbytes
Block 0 to Block 5 (32+8+8+8
+4+4) Kbytes
User ROM area
page 244
f o
3
6
4
0F0000
h
Block 5 : 32 Kbytes
0F7FFFh
0F8000h
Block 4 : 8 Kbytes
0F9FFFh
0FA000h
Block 3 : 8 Kbytes
0FBFFFh
0FC000h
Block 2 : 8 Kbytes
0FDFFFh
0FE000h
Block 1 : 4 Kbytes
0FEFFFh
0FF000h
Block 0 : 4 Kbytes
0FFFFFh
22. Flash Memory Version
0FF000h
4 Kbytes
0FFFFFh
Boot ROM area
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