M16C62_M Datasheet, PDF (43/615 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

Processor Mode
Mitsubishi microcomputers
M16C / 62A Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Single-chip mode
0000016
0040016
SFR area
Internal
RAM area
XXXXX16
0400016
Inhibited
D000016
YYYYY16
Internal
ROM area
FFFFF16
Memory expansion mode
SFR area
Internal
RAM area
Internally
reserved area
External
area
Internally
reserved area
Internal
ROM area
Microprocessor mode
SFR area
Internal
RAM area
Internally
reserved area
External
area
RAM size
3K bytes
4K bytes
5K bytes
10K bytes
20K bytes
Address XXXXX16
00FFF16
013FF16
017FF16
02BFF16
053FF16
ROM size Address YYYYY16
32K bytes
F800016
64K bytes
F000016
96K bytes
E800016
128K bytes
256K bytes
E000016
C000016
External area : Accessing this area allows the user to
access a device connected externally
to the microcomputer.
Note : These memory maps show an instance in which PM13 is set to 0; but in the case of products in which the
internal RAM and the internal ROM are expanded to over 15 Kbytes and 192 Kbytes, respectively, they show
an instance in which PM13 is set to 1.
Figure 1.7.2. Memory maps in each processor mode (without memory area expansion, normal mode)
Internal Reserved Area Expansion Bit (PM13)
This bit expands the internal RAM area and the internal ROM area, and changes the chip select area. In
M30624MGA/FGA, for example, to set this bit to “1” expands the internal RAM area and the internal ROM
area to 20 Kbytes and 256 Kbytes respectively. Refer to Figure 1.7.3 for the chip select area. When the
reset is revoked, this bit is set to “0”. To expand the internal area, set this bit to “1” in user program. And
the top of user program must be allocated to D000016 or subsequent address.
In the case of the product in which the internal ROM is 192 Kbytes or less and the internal RAM is 15
Kbytes or less, set this bit to “0” when this product is used in the memory expansion mode or the micro-
processor mode. When the product is used in the single chip mode, the internal area is not expanded and
any action is not affected, even if this bit is set to “1”.
1-24