Memory Map - Renesas R8C/18 Series Hardware Manual

R8C/18 Group, R8C/19 Group
17.2

Memory Map

The flash memory contains a user ROM area and a boot ROM area (reserved area). Figure 17.1 shows
a Flash Memory Block Diagram for R8C/18 Group. Figure 17.2 shows a Flash Memory Block Diagram
for R8C/19 Group.
The user ROM area of the R8C/19 Group contains an area (program ROM) which stores MCU operating
programs and the blocks A and B (data flash) each 1 byte 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 is set to 0 (rewrite enabled), block 0 is rewritable.
When the FMR16 bit is set to 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 17.1 Flash Memory Block Diagram for R8C/18 Group
Rev.1.30 Apr 14, 2006
REJ09B0222-0130
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
17. Flash Memory Version
Program ROM
Program ROM
0E000h
8 Kbytes
0FFFFh
Boot ROM area
(reserved area)
(2)