參數(shù)資料
型號(hào)： M37736M4LXXXHP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP100
封裝： 14 X 14 MM, 0.50 MM PITCH, PLASTIC, LQFP-100
文件頁數(shù)： 31/32頁
文件大小： 327K
代理商： M37736M4LXXXHP
8
MITSUBISHI MICROCOMPUTERS
M37736M4LXXXHP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
PRELIMINARY
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
ROM AREA MODIFICATION FUNCTION
The internal ROM size and its address area of the M37736M4LXXXHP
can be modified by the memory allocation control register’s bit 0 shown
in Figure 4.
Figure 6 shows the memory allocation in which the internal ROM
size and its address area are modified.
Make sure to write data in the memory allocation control register as
the flow shown in Figure 5.
This ROM area modification function is valid in memory expansion
mode and single-chip mode.
Table 1 shows the relationship between memory allocation selection
___
bits and address corresponding to chip-select signals CS0 and CS1
in the external bus mode B.
When ordering a mask ROM, Mitsubishi Electric corp. produces the
mask ROM using the data within 32 Kbytes (addresses 00800016 –
00FFFF16). It is regardless of the selected ROM size (refer to MASK
ROM ORDER CONFIRMATION FORM.) Therefore, program “FF16”
to the addresses out of the selected ROM area in the EPROM which
you tender when ordering a mask ROM.
Address 00FFFF16 of this microcomputer corresponds to the lowest
address of the EPROM which you tender.
76543210
ML0
Memory allocation control register
Memory allocation selection bit
ROM size
(ROM area)
0 : 32 Kbytes
(addresses 00800016 – 00FFFF16)
1 : 16 Kbytes
(addresses 00C00016 – 00FFFF16)
Address
6316
Note. Write to the memory allocation control register as the flow shown in Figure 5.
Fig. 5 How to write data in memory allocation control register
Fig. 4 Bit configuration of memory allocation control register
Writing data “5516” (LDM instruction)
Writing data “0016” or “0116” (LDM instruction)
ML0 selection bit
Next instruction
How to write in memory allocation control register
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