Memory - Renesas M16C Series User Manual

M30240 Group

1.2.3 Memory

Type
M30240M5
M30240M6
M30240ECFP
Figure 1.8: Memory Map
Figure 1.8 is a memory map of the M30240 group. The address space extends the 1M bytes from
address 00000 to FFFFF
16
there is 128K bytes of internal ROM from E0000
from FFE00 to FFFDB
16
are stored here, subroutine call instructions and jump instructions can be used as two-byte instructions,
reducing the number of program steps.
The vector table for fixed interrupts such as the reset and NMI are mapped from FFFDC
The starting addresses of the interrupt routines are stored here. The address of the vector table for
software interrupts can be set as desired using the internal register (INTB). See Section 2.12 on
interrupts for further details.
Addresses below xxxxx
mapped to the space from 00400
used when calling subroutines and when interrupts are generated.The SFR area is mapped to 00000
to 003FF . This area accommodates control registers for peripheral devices such as I/O ports, A-D
16
converter, serial I/O, and timers. Section 2.4 describes the SFR area for peripheral unit control registers.
Any part of the SFR area that is unoccupied is reserved and cannot be used for other purposes.
Rev.1.00 Sep 24, 2003 Page 14 of 360
Address xxxxx Address yyyyy
16
F6000
00FFF
16
00FFF F4000
16
017FF E0000
16
. Addresses above yyyyy
16
. If the starting addresses of subroutines or the destination addresses of jumps
16
are RAM. For example, in M30240ECFP, 5K bytes of internal RAM are
16
to 017FF . In addition to storing data, the RAM also stores the stack
16 16
00000
16
SFR
00400
16
RAM
XXXXX
16
unused
yyyyy
16
ROM
FFE00
16
Special page
vector table
FFFDC
16
Undefined instruction
Overflow
BRK instruction
16
Address match
Single step
16
Watchdog timer
DBC
16
NMI
Reset
16
FFFFF
16
are ROM. For example, in the M30240ECFP,
16
to FFFFF . The special page vector table is mapped
16 16
Memory
to FFFFF .
16 16
16