Memory Map - Renesas R8C Series User Manual

R8C/1A Group, R8C/1B Group
18.2

Memory Map

The flash memory contains a user ROM area and a boot ROM area (reserved area). Figure 18.1 shows a Flash
Memory Block Diagram for R8C/1A Group. Figure 18.2 shows a Flash Memory Block Diagram for R8C/1B
Group.
The user ROM area of the R8C/1B Group contains an area (program ROM) which stores MCU operating programs
and the blocks A and B (data flash) each 1 Kbyte in size.
The user ROM area is divided into several blocks. The user ROM area can be rewritten in CPU rewrite mode and
standard serial I/O and parallel I/O modes.
When rewriting blocks 0 and 1 in CPU rewrite mode, set the FMR02 bit in the FMR0 register to 1 (rewrite
enabled). When the FMR15 bit in the FMR1 register to is set to 0 (rewrite enabled), block 0 is rewritable. When
the FMR16 bit to is set 0 (rewrite enabled), block 1 is rewritable.
The rewrite control program for standard serial I/O mode is stored in the boot ROM area before shipment. The boot
ROM area and the user ROM area share the same address, but have separate memory areas.
8 Kbyte ROM product
0E000h
Block 0: 8 Kbytes
0FFFFh
User ROM area
16 Kbyte ROM product
0C000h
Block 1: 8 Kbytes
0DFFFh
0E000h
Block 0: 8 Kbytes
0FFFFh
User ROM area
NOTES:
1. When the FMR02 bit in the FMR0 register is set to 1 (rewrite enabled) and the FMR15 bit in
the FMR1 register to 0 (rewrite enabled), block 0 is rewritable. When the FMR16 bit is set to
0 (rewrite enabled), block 1 is rewritable (only for CPU rewrite mode).
2. This area is for storing the boot program provided by Renesas Technology.
Figure 18.1 Flash Memory Block Diagram for R8C/1A Group
Rev.1.30 Dec 08, 2006
REJ09B0252-0130
4 Kbyte ROM product
(1)
0F000h
Block 0: 4 Kbytes
0FFFFh
12 Kbyte ROM product
(1)
0D000h
Block 1: 4 Kbytes
0DFFFh
0E000h
(1)
Block 0: 8 Kbytes
0FFFFh
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(1)
User ROM area
(1)
(1)
User ROM area
18. Flash Memory
Program ROM
Program ROM
0E000h
8 Kbytes
0FFFFh
Boot ROM area
(reserved area)
(2)