參數資料
型號: M37754S4CHP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, 40 MHz, MICROCONTROLLER, PQFP100
封裝: 0.50 MM PITCH, FINE PITCH, PLASTIC, QFP-100
文件頁數: 91/114頁
文件大小: 1116K
代理商: M37754S4CHP
78
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
MITSUBISHI MICROCOMPUTERS
M37754M8C-XXXGP, M37754M8C-XXXHP
M37754S4CGP, M37754S4CHP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
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.
When ordering a mask ROM, Mitsubishi Electric corp. produces the
mask ROM using the data within 60 Kbytes (between addresses
00100016 to 00FFFF16). It is regardless of the selected ROM size
(refer to MASK ROM ORDER CONFIRMATION FORM). Therefore,
on the EPROM tendered for ordering a mask ROM, program data
“FF16” to addresses which correspond to the area out of the selected
ROM area.
Additionally, address 00FFFF16 of the microcomputer corresponds
to the lowest address of the tendered EPROM.
00 000016
00 008016
00 087F16
00 200016
00 FFFF16
Internal ROM
60 Kbytes
Internal ROM
56 Kbytes
SFR
Internal RAM 2048 bytes
SFR
Internal RAM 2048 bytes
FF FFFF16
00 000016
00 008016
00 087F16
00 100016
00 FFFF16
FF FFFF16
External memory area
Memory allocation select bit = “0”
ROM size : 60 Kbytes
RAM size : 2048 bytes
Memory allocation select bit = “1”
ROM size : 56 Kbytes
RAM size : 2048 bytes
External memory area
Note : The internal ROM area becomes external memory area
in microprocessor mode.
Fig. 90 Memory allocation when modifying internal memory area with memory allocation select bit
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