Renesas M16C/29 Series User Manual

3. Memory
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page 23
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3. Memory
Figure 3.1 is a memory map of the M16C/29 Group. M16C/29 Group provides 1-Mbyte address space from
addresses 0000016 to FFFFF16. The internal ROM is allocated lower addresses beginning with address
FFFFF16. For example, 64-Kbytes internal ROM is allocated addresses F000016 to FFFFF16.
Two 2-Kbyte internal ROM areas, block A and block B, are available in the flash memory version. The
blocks are allocated addresses F00016 to FFFF16.
The fixed interrupt vector tables are allocated addresses FFFDC16 to FFFFF16. It stores the starting ad-
dress of each interrupt routine. See the section on interrupts for details.
The internal RAM is allocated higher addresses beginning with address 0040016. For example, 4-Kbytes
internal RAM is allocated addresses 0040016 to 013FF16. Besides sotring data, it becomes stacks when the
subroutines is called or an interrupt is acknowledged.
SFR, consisting of control registers for peripheral functions such as I/O port, A/D converter, serial I/O,
timers is allocated addresses 0000016 to 003FF16. All blank spaces within SFR are reserved and cannot be
accessed by users.
The special page vector table is allocated to the addresses FFE0016 to FFFDB16. This vector is used by the
JMPS or JSRS instruction. For details, refer to the M16C/60 and M16C/20 Series Software Manual .
Figure 3.1 Memory Map
00000 16
XXXXX 16
FFFFF 16
00400 16
YYYYY 16
Internal ROM
(2)
(program space)
SFR Area
Internal RAM
FFE00 16
FFFDC 16
FFFFF 16
Undefined Instruction
Overflow
BRK Instruction
Address Match
Single Step
Watchdog Timer
Reset
Special Page
Vector Table
DBC
Reserved Space
Internal ROM
(data space)
Reserved Space
0F000 16
XXXXX 16 YYYYY 16
Internal RAM area
Internal ROM area
Memory size
013FF
16
023FF 16
F0000 16
4 Kbytes
64 Kbytes
Memory size
E8000
16
96 Kbytes
NOTES:
1. The block A (2K bytes) and block B (2K bytes) are shown (only flash memory).
2. Do not write to the internal ROM area in Mask ROM ver..
(1)
0FFFF 16
NMI
033FF
16
8 Kbytes
E0000
16
128 Kbytes
12 Kbytes

Renesas M16C/29 Series Specifications

General

Brand	Renesas
Model	M16C/29 Series
Category	Microcontrollers
Language	English