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M16C/29 Group
21.2 Memory Map
The flash memory contains the user ROM area and the boot ROM area (reserved area). Figures 21.2.1 to
21.2.3 show the flash memory block diagram. The user ROM area has space to store the microcomputer
operation program in single-chip mode and a separate 4K Data block area (two 2K blocks A and B).
The user ROM area is divided into several blocks. The user ROM area can be rewritten in CPU rewrite,
standard serial input/output, and parallel input/output modes. However, if block 0 and 1 are rewritten in
CPU rewrite mode, setting the FMR02 bit in the FMR0 register to "1" (block 0, 1 rewrite enabled) and the
FMR16 bit in the FMR1 register to "1"(blocks 0 to 5 rewrite enabled) enable rewriting. Also, if blocks 2 to 5
are rewritten in CPU rewrite mode, setting the FMR16 bit in the FMR1 register to "1" (blocks 0 to 5 rewrite
enabled) enables writing. Setting the PM10 bit in the PM1 register to "1"(data area access enabled) for
block A and B enables to use.
00F000
16
00F7FF
16
00F800
16
00FFFF
16
0F0000
16
0F7FFF
16
0F8000
16
0FBFFF
16
0FC000
16
0FDFFF
16
0FE000
16
0FFFFF
16
Figure 21.2.1. Flash Memory Block Diagram (ROM capacity 64K byte)
Rev.1.00 Nov 01,2004
REJ09B0101-0100Z
Block B :2K bytes (Note 2)
Block A :2K bytes (Note 2)
Block 3 : 32K bytes (Note 5)
Block 2 : 16K bytes
Block 2 : 16K bytes (Note 5)
Block 1 : 8K bytes (Note 3)
Block 0 : 8K bytes (Note 3)
User ROM area
page 367 of 402
Note 1: To specify a block, use the maximum even address in the block.
Note 2: Blocks A and B are enabled to use when the PM10 bit in the PM1
register is set to "1".
Note 3: Blocks 0 and 1 are enabled for programs and erases when the
FMR02 bit in the FMR0 register is set to "1" and the FMR16 bit in
the FMR1 register is set to "1". (CPU rewrite mode only)
Note 4: The boot ROM area is reserved. Do not access.
Note 5: Blocks 2 and 3 are enabled for programs and erases when the
FMR16 bit in the FMR1 register is set to "1". (CPU rewrite mode
only)
0FF000
16
4K bytes (Note 4)
0FFFFF
16
Boot ROM area
21. Flash Memory Version
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