12
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
MITSUBISHI MICROCOMPUTERS
M37753FFCFP
M37753FFCHP
SHINGLE-CHIP 16-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION
MEMORY AREA MODIFICATION FUNCTION
For the M37753FFCFP and the M37753FFCHP, the internal
memory’s size and address area can be changed by setting bits 2, 3,
4 (memory allocation select bits) of the particular function select reg-
ister 0 (see figure 5). Figure 4 shows the memory map when chang-
ing the internal memory area.
(Reserved area)
Internal RAM 3968 bytes
SFR
(ML2, ML1, ML0) = (0, 0, 0)
Flash memory size : 120 Kbytes
RAM size : 3968 bytes
Internal RAM 3968 bytes
SFR
Internal flash memory
60 Kbytes
Internal RAM 3072 bytes
SFR
(ML2, ML1, ML0) = (0, 0, 1)
Flash memory size : 92 Kbytes
RAM size : 3968 bytes
(ML2, ML1, ML0) = (0, 1, 0)
Flash memory size : 60 Kbytes
RAM size : 3072 bytes
(ML2, ML1, ML0) = (0, 1, 1)
Flash memory size : 56 Kbytes
RAM size : 3072 bytes
00 000016
00 008016
00 0FFF16
00 100016
01 EFFF16
01 FFFF16
FF FFFF16
00 000016
00 008016
00 0C7F16
00 100016
00 FFFF16
FF FFFF16
00 000016
00 008016
00 0C7F16
00 200016
00 FFFF16
FF FFFF16
Internal flash memory
48 Kbytes
Internal RAM 2048 bytes
SFR
(ML2, ML1, ML0) = (1, 0, 0)
Flash memory size : 48 Kbytes
RAM size : 2048 bytes
00 000016
00 008016
00 087F16
00 400016
00 FFFF16
FF FFFF16
00 000016
00 008016
00 0FFF16
00 800016
01 EFFF16
01 FFFF16
FF FFFF16
ML0 : Memory allocation select bit 0
ML1 : Memory allocation select bit 1
ML2 : Memory allocation select bit 2
Internal RAM 2048 bytes
SFR
(ML2, ML1, ML0) = (1, 0, 1)
Flash memory size : 32 Kbytes
RAM size : 2048 bytes
00 000016
00 008016
00 087F16
00 800016
00 FFFF16
FF FFFF16
Internal flash memory
60 Kbytes
Internal flash memory
56 Kbytes
Internal RAM 2048 bytes
SFR
(ML2, ML1, ML0) = (1, 1, 0)
Flash memory size : 60 Kbytes
RAM size : 2048 bytes
00 000016
00 008016
00 087F16
00 100016
00 FFFF16
FF FFFF16
Internal RAM 2048 bytes
(ML2, ML1, ML0) = (1, 1, 1)
Flash memory size : 56 Kbytes
RAM size : 2048 bytes
00 000016
00 008016
00 087F16
00 200016
00 FFFF16
FF FFFF16
Note: The internal flash memory area becomes the external memory area in the microprocessor mode.
Internal flash memory
120 Kbytes
(Reserved area)
Internal flash memory
92 Kbytes
Internal flash memory
56 Kbytes
Internal RAM 3072 bytes
Internal flash memory
32 Kbytes
Fig. 4 Memory allocation (Internal memory area modification by memory allocation select bits)
External memory area