M16C26A Datasheet, PDF (249/352 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES

M16C/26A Group (M16C/26A, M16C/26B, M16C/26T)
17. Flash Memory Version
17.2 Memory Map
The flash memory contains the user ROM area and the boot ROM area (reserved area). Figures 17.2.1 to
17.2.3 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 2-Kbyte space as the block 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 3 rewrite enabled) enable rewriting. Also, if blocks 2 to 3
are rewritten in CPU rewrite mode, setting the FMR16 bit in the FMR1 register to “1” (blocks 0 to 3 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.
00F00016
00F7FF16
00F80016
00FFFF16
Block B :2K bytes (2)
Block A :2K bytes (2)
0F000016
Block 3 : 32K bytes (5)
0F7FFF16
0F800016
Block 2 : 16K bytes
Block 2 : 16K bytes (5)
0FBFFF16
0FC00016
0FDFFF16
0FE00016
0FFFFF16
Block 1 : 8K bytes (3)
Block 0 : 8K bytes (3)
User ROM area
NOTES:
1. To specify a block, use the maximum even address in the block.
2. Blocks A and B are enabled to use when the PM10 bit in the PM1
register is set to "1".
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)
4. The boot ROM area is reserved. Do not access.
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)
0FF00016
0FFFFF16
4K bytes (4)
Boot ROM area
Figure 17.2.1. Flash Memory Block Diagram (ROM capacity 64K byte)
Rev. 2.00 Feb.15, 2007 page 232 of 329
REJ09B0202-0200