M37754 Mitsubishi, M37754 Datasheet - Page 78

• Manufacturer Part Number: M37754
• Description: SINGLE-CHIP 16BIT CMOS MICROCOMPUTER
• Manufacturer: Mitsubishi

MEMORY MODIFICATION FUNCTION
The M37754M8C-XXXGP’s internal memory size and address area
can be modified by set of bit 2 (memory allocation select bit) of the
particular function select register 0. Figure 90 shows the memory al-
location when modifying the internal memory area.
Fig. 90 Memory allocation when modifying internal memory area with memory allocation select bit
78
FF FFFF
00 FFFF
00 0000
00 0080
00 087F
00 1000
Memory allocation select bit = “0”
16
16
16
16
16
16
ROM size : 60 Kbytes
RAM size : 2048 bytes
Internal RAM 2048 bytes
External memory area
Internal ROM
60 Kbytes
SFR
FF FFFF
00 FFFF
00 0000
00 0080
00 087F
00 2000
Memory allocation select bit = “1”
16
16
16
16
16
16
M37754M8C-XXXGP, M37754M8C-XXXHP
Internal RAM 2048 bytes
ROM size : 56 Kbytes
RAM size : 2048 bytes
External memory area
Internal ROM
56 Kbytes
SFR
When ordering a mask ROM, Mitsubishi Electric corp. produces the
mask ROM using the data within 60 Kbytes (between addresses
001000
(refer to MASK ROM ORDER CONFIRMATION FORM). Therefore,
on the EPROM tendered for ordering a mask ROM, program data
“FF
ROM area.
Additionally, address 00FFFF
to the lowest address of the tendered EPROM.
M37754S4CGP, M37754S4CHP
16
” to addresses which correspond to the area out of the selected
16
Note : The internal ROM area becomes external memory area
to 00FFFF
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
in microprocessor mode.
16
MITSUBISHI MICROCOMPUTERS
). It is regardless of the selected ROM size
16
of the microcomputer corresponds